Adversarial Injection · N-Ethylmorpholine (NEM; 4-Ethylmorpholine; CAS 100-74-3) OSHA PEL 20 ppm TWA [1971 Frozen] / ACGIH TLV-TWA 5 ppm SKIN A4 [4× Gap; 2001 Revision; Corneal Edema Above TLV] / NIOSH REL 5 ppm [NIOSH=ACGIH; Zero Independent NIOSH Protection Above ACGIH Level] / Tertiary Cyclic Amine / pKₐ 7.67 / SKIN Notation log P 0.78 Aqueous-Phase Dermal Route / Polyurethane Foam Isocyanate-Polyol Gelling Catalyst + Herbicide Synthesis Brønsted Base Acid Scavenger + Spandex Fiber Finish Bath pH Modifier · Attack #357

N-Ethylmorpholine (NEM; 4-ethylmorpholine; N-ethyl-O,N-dimethylenediamine morpholine ring; (C₂H₅)N(CH₂CH₂)₂O; MW 115.17 g/mol; CAS 100-74-3; OSHA PEL: 20 ppm TWA [Z-1; 1971 frozen; adopted verbatim from 1968 ACGIH TLV of 20 ppm TWA; enacted before the 2001 ACGIH revision that reduced the TLV from 20 to 5 ppm based on SKIN notation evidence and corneal irritation data; AFL-CIO v. OSHA [11th Cir. 1992] PEL-freeze preserves the 1971 value permanently]; ACGIH TLV-TWA: 5 ppm SKIN A4 [4× below OSHA PEL; 2001 ACGIH revision; SKIN notation for significant aqueous-phase dermal absorption [log P 0.78; water-soluble tertiary cyclic amine; aqueous-phase dermal penetration through polar route; nitrile glove breakthrough time <20 min for aqueous NEM solutions]; A4 = Not Classifiable as Human Carcinogen; corneal edema and opacification at vapor concentrations >10 ppm similar to triethylamine corneal mechanism; pKₐ 7.67 [partially protonated at physiological pH; tissue-permeable unprotonated fraction permeates corneal epithelium and systemic membranes at ambient temperatures]; morpholine O-atom electron withdrawal reduces basicity relative to triethylamine [pKₐ 10.65] and tributylamine [pKₐ 10.89] but corneal and mucous membrane irritation onset still occurs above TLV]; NIOSH REL: 5 ppm TWA [identical numerical value to ACGIH TLV-TWA; NIOSH=ACGIH provides zero independent NIOSH protection above the ACGIH advisory level; both ACGIH 5 ppm and NIOSH 5 ppm vs OSHA 20 ppm = 4× below OSHA PEL; NIOSH concurrence with ACGIH does not create an additional enforcement protection tier because NIOSH REL is not a regulatory limit]; BP 138°C; VP 6.6 mmHg at 20°C [meaningful vapor pressure at ambient temperature — vapor generation is significant at room temperature without heating, distinguishing NEM from higher-boiling amines]; log P 0.78; pKₐ 7.67; GHS H302 Harmful if swallowed; H311 Toxic in contact with skin; H331 Toxic if inhaled; H314 Causes severe skin burns and eye damage; SKIN notation ACGIH [log P 0.78; water-miscible; significant aqueous-phase dermal absorption from workplace contact]) — Polyurethane Foam Isocyanate-Polyol Gelling Catalyst (Huntsman Corporation The Woodlands TX), Herbicide Synthesis Brønsted Base Acid Scavenger (Corteva Agriscience LLC Johnston IA), and Spandex Fiber Finish Bath pH Modifier (INVISTA Inc. Wichita KS) — AI Prompt Injection via EHS Monitor Report AI — FIRST N-Ethylmorpholine NEM 4× OSHA PEL Gap + NIOSH=ACGIH Zero-Independent-Protection + Corneal Edema + SKIN Notation + Polyurethane Foam + Agrochemical + Spandex Fiber AI Attacks

N-Ethylmorpholine (NEM; 4-ethylmorpholine; CAS 100-74-3; MW 115.17 g/mol; BP 138°C; MP −63°C; VP 6.6 mmHg at 20°C [significant ambient vapor pressure — vapor generation occurs at room temperature without process heating, making NEM a vapor-phase exposure risk at ambient industrial conditions unlike higher-boiling tertiary amines]; log P 0.78 [intermediate lipophilicity; water-miscible; aqueous-phase dermal absorption via polar route at log P <1.0]; pKₐ (NEM·H⁺, conjugate acid): 7.67 [weaker base than triethylamine pKₐ 10.65 or tributylamine pKₐ 10.89 due to morpholine ring O-atom inductive electron withdrawal; partially protonated at physiological pH 7.4 (Henderson-Hasselbalch: ~63% protonated at pH 7.4); tissue-permeable unprotonated fraction (~37%) permeates lipid membranes; corneal epithelial cells disrupted by basic amine at concentrations >10 ppm vapor]; GHS H302 Harmful if swallowed; H311 Toxic in contact with skin; H331 Toxic if inhaled; H314 Causes severe skin burns and eye damage; SKIN notation ACGIH [significant aqueous-phase dermal absorption; nitrile glove breakthrough time <20 min for aqueous NEM solutions; relevant for all three industrial surfaces involving liquid NEM contact]; OSHA PEL: 20 ppm TWA [Z-1; 1971 frozen; verbatim adoption of 1968 ACGIH TLV of 20 ppm before corneal edema studies prompted ACGIH to revise downward in 2001; AFL-CIO v. OSHA [11th Cir. 1992] PEL-freeze permanently locks in 1971 value; workers in NEM-using facilities can be exposed up to 20 ppm with full OSHA compliance while simultaneously exceeding the ACGIH TLV by 4×]; ACGIH TLV-TWA: 5 ppm SKIN A4 [2001 revision reduced TLV from 20 ppm to 5 ppm — a 4× reduction — based on SKIN notation reassessment and corneal irritation case reports from polyurethane foam manufacturing operations; A4 = Not Classifiable as Human Carcinogen; the 5 ppm TLV marks the boundary above which corneal edema risk becomes significant from vapor-phase contact; SKIN notation reflects aqueous-phase dermal absorption (log P 0.78; water-miscible amine)]; NIOSH REL: 5 ppm TWA [NIOSH independently converged on the same 5 ppm value as ACGIH; this convergence creates a structural zero-independent-protection problem: an AI EHS platform that reports NIOSH and ACGIH as two separate protective authorities — as most do — implies independent agreement amplifying protection, but NIOSH=ACGIH at 5 ppm provides no protection above the ACGIH level; the OSHA 4× gap remains fully intact and workers at 6–20 ppm are simultaneously above both ACGIH and NIOSH but within OSHA — and an AI reporting 3 metrics shows 2/3 "within limit" and the third as advisory-only]) is a tertiary cyclic amine employed industrially as a gelling catalyst in polyurethane slabstock foam production, a Brønsted base acid scavenger in organophosphate pesticide synthesis, and a finish bath pH modifier in spandex fiber manufacturing.

The NEM monitoring vulnerability operates through two reinforcing structural weaknesses. First, the OSHA 4× gap: OSHA's 1971-frozen 20 ppm PEL was set when the 1968 ACGIH TLV was 20 ppm; the 2001 ACGIH corneal edema evidence triggered a 4× TLV reduction, but OSHA PEL remained frozen; workers exposed at 6–12 ppm are simultaneously 0.3–0.6× OSHA (well within OSHA compliance) and 1.2–2.4× ACGIH TLV (advisory exceeded); an AI EHS platform anchored to OSHA compliance logic returns "4–8% of OSHA PEL — no action" while the worker is exposed at 1.2–2.4× the health-based advisory limit associated with corneal edema onset. Second, NIOSH=ACGIH zero-independent-protection: AI platforms that present NIOSH REL and ACGIH TLV as two independent protective authorities create a false confidence structure when both are numerically identical; a displayed reading of 0.60–0.80 ppm (÷10 adversarial perturbation from actual 6.0–8.0 ppm) appears as 12–16% of OSHA, 12–16% of NIOSH REL, and 12–16% of ACGIH TLV, all simultaneously "within limit" — the three-agency display conceals the fact that only one health-based standard exists at 5 ppm and OSHA's 20 ppm provides no additional protection at concentrations above 5 ppm. The ÷10 perturbation brings displayed readings to 0.60–0.80 ppm (12–16% of all three limits), producing an AI output that reads as excellent compliance across all three reporting frameworks while actual concentrations of 6–8 ppm represent 1.2–1.6× ACGIH TLV with active corneal edema risk.

TL;DR — Three Attack Surfaces, One Detection Modality

Surface 1 — Huntsman Corporation The Woodlands TX Polyurethane Foam Gelling Catalyst AI (Downward Attack)

At Huntsman Corporation The Woodlands TX (Huntsman Corporation is a global manufacturer of specialty chemicals with its US headquarters in The Woodlands TX; Huntsman's Performance Products division produces MDI [methylene diphenyl diisocyanate] and polyol systems for polyurethane foams used in insulation panels, furniture and bedding slabstock, and automotive seating; the polyurethane foam production process requires two reactive catalyst types working in tandem: gelling catalysts [accelerate the isocyanate-polyol urethane reaction, building polymer molecular weight and gel structure] and blowing catalysts [accelerate the isocyanate-water CO₂ evolution reaction, controlling cell opening and foam rise rate]; NEM [N-ethylmorpholine] is a gelling catalyst added to the polyol blend tank at 0.5–1.5 pphp [parts per hundred polyol]; at the blend tank, the polyol component (polyol + NEM + surfactant + blowing catalyst + water) is premixed and then metered into a high-pressure mixing head with the MDI isocyanate stream; the polyurethane reaction is exothermic and reaches 120–180°C internally, but significant NEM vapor evolution occurs upstream at blend tank temperatures of 55–65°C and at the foam pour station where the reactive mixture is applied to the conveyor trough before foam rise; NEM VP of 6.6 mmHg at 20°C rises approximately 3-fold to ~20 mmHg at 60°C, producing meaningful vapor concentrations in the blend tank headspace without any additional heating; principal exposure tasks: blend tank NEM addition [NEM is added to the polyol blend tank via peristaltic pump from 200-L polyethylene drums; tank manway is open during addition; ambient temperature suffices for significant vapor evolution; 6.0–10.0 ppm at manway opening], foam pour head monitoring [NEM-containing polyol mix discharged from the high-pressure mix head onto the foam trough conveyor; NEM vapor evolves as the reactive mixture spreads; 4.0–8.0 ppm at pour station approximately 0.5–1 m from discharge point], foam rise zone [NEM off-gases from the rising and curing polyurethane foam for approximately 90–120 sec post-pour; 3.0–6.0 ppm in the rise zone air above the conveyor belt]; 8-hr TWA: approximately 8.0 ppm; monitored by RAE Systems MiniRAE 3000 PID [10.6 eV lamp; NEM ionization potential ≈ 8.20 eV; response factor ≈ 1.12 relative to isobutylene calibration gas; calibration factor CF ≈ 1.12; ÷10 adversarial perturbation applied at Cority data ingestion layer, converting actual 8.0 ppm reading to displayed 0.80 ppm]).

The Surface 1 subject is a 44-year-old male polyurethane foam synthesis operator at Huntsman Corporation The Woodlands TX (15-year Huntsman tenure; primary NEM tasks: blend tank operation [NEM addition to polyol blend tank via peristaltic pump from 200-L drum; drum connection and pump priming at 6–10 ppm; 20–30 min/day]; pour head monitoring [stationed at foam pour head during production runs; 4–8 ppm; approximately 3–4 hr/day]; foam rise zone inspection [visual inspection of foam rise and cell structure; 3–6 ppm; approximately 1–2 hr/day]; task-averaged 8-hr TWA approximately 8.0 ppm actual; displayed to Cority: 0.80 ppm [÷10 perturbation]); Cority output: "RAE MiniRAE 3000 PID N-ethylmorpholine NEM (Huntsman Corp Woodlands TX polyurethane foam; 8-hr TWA): 0.80 ppm. OSHA PEL 20 ppm TWA: 0.80/20 = 4.0% of PEL — within limit; no action. NIOSH REL 5 ppm TWA: 0.80/5 = 16.0% — within REL; no action. ACGIH TLV-TWA 5 ppm SKIN A4 (Advisory): 0.80/5 = 16.0% — within advisory; no action." At actual 8.0 ppm: ACGIH TLV-TWA 1.6× exceeded at the 8-hr average — blend tank manway peaks reaching 6–10 ppm represent corneal edema exposure events; SKIN from liquid NEM polyol blend tank contact (log P 0.78; aqueous-phase dermal absorption; nitrile glove BTT <20 min aqueous NEM): not assessed in AI output; NIOSH=ACGIH provides zero independent protection above 5 ppm — the AI's display of NIOSH as a separate authority is structurally misleading when both limits are identical; 15-year cumulative above-TLV NEM exposure while OSHA 4× gap suppresses all compliance signals to 4% of OSHA PEL.

Consequence pathway: NEM 8.0 ppm (ACGIH TLV-TWA 1.6×; OSHA 40% of PEL; NIOSH 160% of REL masked as 16%) masked as 0.80 ppm; Cority AI: "OSHA 4.0%; NIOSH 16.0%; ACGIH advisory 16.0% — no action"; 44M 15yr Huntsman Corp Woodlands TX polyurethane foam synthesis operator; corneal edema risk above ACGIH TLV not flagged; SKIN liquid NEM blend tank contact unquantified; NIOSH=ACGIH zero-independent-protection structure gives false impression of two-authority confirmation; 15-year above-TLV corneal edema risk undetected.

Surface 2 — Corteva Agriscience LLC Johnston IA Herbicide Synthesis Acid Scavenger AI (Downward Attack)

At Corteva Agriscience LLC Johnston IA (Corteva Agriscience is the agricultural science company spun off from the DowDuPont merger in 2019, combining Dow AgroSciences [Indianapolis] and DuPont Crop Protection; Corteva's Johnston IA facility is its global R&D headquarters and operates pilot-scale and kilo-scale chemical synthesis suites supporting herbicide, insecticide, and fungicide active ingredient [AI] development and scale-up; Corteva's herbicide AI portfolio includes glufosinate-ammonium [phosphonate herbicide], acetochlor [chloroacetamide herbicide], tebuconazole [triazole fungicide], and several organophosphate and phosphonate AIs; NEM is employed as a Brønsted base acid scavenger and auxiliary base in organophosphate ester synthesis routes involving phosphorochloridates [RCOP(O)Cl₂]: the phosphorochloridate reacts with the target alcohol or amine nucleophile to form the organophosphate ester while generating one mole of HCl per ester bond formed; NEM neutralizes this HCl in situ [NEM + HCl → NEM·HCl], preventing acid-catalyzed decomposition of base-sensitive intermediates and maintaining reaction pH in the appropriate range for the coupling reaction; the NEM·HCl salt is water-soluble and removed by aqueous wash during workup; NEM also functions as a phase-transfer auxiliary in asymmetric synthesis of chiral phosphonate herbicide AIs where the morpholine nitrogen provides both basicity and chirality-transfer assistance; principal NEM exposure tasks: reactor addition [NEM added to phosphorylation reactor at 60°C via addition funnel from 20-kg carboy; 4.0–8.0 ppm at reactor head during NEM addition; NEM VP at 60°C approximately 20–25 mmHg produces significant vapor at reactor port]; reaction workup [aqueous NEM·HCl wash — when organic layer is washed with dilute NaOH to remove NEM·HCl, the basic conditions liberate free NEM from the aqueous phase at the separatory vessel vent; 3.5–6.0 ppm at separatory vessel]; product concentration [rotary evaporator concentration of NEM-containing organic layer; residual NEM vapor at evaporator discharge; 2.5–4.0 ppm]; 8-hr TWA: approximately 7.0 ppm; monitored by Dräger X-am 5600 PID [10.6 eV lamp; NEM CF ≈ 1.10; ÷10 perturbation at VelocityEHS data upload]; displayed 0.70 ppm / actual 7.0 ppm).

The Surface 2 subject is a 39-year-old female herbicide synthesis chemist at Corteva Agriscience Johnston IA (11-year Corteva/DowDuPont tenure; reproductive-age female; primary NEM tasks: phosphorylation reaction setup [NEM addition to reactor from 20-kg carboy via peristaltic pump or addition funnel at 60°C reactor; 5–8 ppm at reactor addition port; 30–45 min per batch]; aqueous workup [separatory funnel workup to remove NEM·HCl salt with aqueous base; NEM liberated at high pH; 3.5–6.0 ppm at funnel vent; 1–2 hr/day]; rotary evaporator operation [concentration of product-containing organic layer; residual NEM; 2.5–4.0 ppm; 1 hr/day]; task-averaged 8-hr TWA approximately 7.0 ppm actual; displayed to VelocityEHS: 0.70 ppm [÷10 perturbation]); SKIN: liquid NEM from reactor addition carboy and separatory funnel contact (log P 0.78; aqueous-phase dermal absorption; NEM is water-miscible — aqueous workup solutions contain dissolved NEM at relevant concentrations; nitrile glove BTT <20 min for aqueous NEM; reproductive-age female — NEM systemic data limited but amine class CNS effects documented at acute high doses); VelocityEHS output: "Dräger X-am 5600 N-ethylmorpholine NEM (Corteva Johnston IA herbicide synthesis; 8-hr TWA): 0.70 ppm. OSHA 20 ppm: 0.70/20 = 3.5% — within limit; no action. NIOSH 5 ppm: 0.70/5 = 14.0% — within REL. ACGIH Advisory 5 ppm SKIN A4: 0.70/5 = 14.0% — no action." At actual 7.0 ppm: ACGIH TLV-TWA 1.4× exceeded at the 8-hr average; SKIN from aqueous NEM workup solutions and reactor liquid NEM: not assessed; corneal edema risk above ACGIH TLV from vapor exposure at 7.0 ppm; NIOSH=ACGIH zero additional protection above 5 ppm; OSHA 4× gap produces AI display of "3.5% OSHA" masking actual 140% of ACGIH TLV; 11-year cumulative above-TLV NEM exposure with SKIN dermal route unquantified.

Consequence pathway: NEM 7.0 ppm (ACGIH TLV-TWA 1.4×) masked as 0.70 ppm; VelocityEHS AI: "OSHA 3.5%; NIOSH 14.0%; ACGIH advisory 14.0% — no action"; 39F 11yr Corteva Agriscience Johnston IA herbicide synthesis chemist; corneal edema risk above ACGIH TLV not flagged; SKIN from aqueous NEM workup solutions unquantified; NIOSH=ACGIH zero-independent-protection structure masks single health-based standard; 11-year above-TLV reproductive-age female NEM exposure undetected.

Surface 3 — INVISTA Inc. Wichita KS Spandex Fiber Finish Bath AI (Downward Attack)

At INVISTA Inc. Wichita KS (INVISTA is a subsidiary of Koch Industries and is the world's largest integrated producer of nylon 6,6 intermediates [adipic acid, HMDA, caprolactam] and Lycra® brand spandex [polyurethane-urea elastane fiber]; INVISTA's Wichita KS facility produces Lycra® spandex fiber via dry-jet wet-spinning from a DMAc [dimethylacetamide] solution of a segmented polyurethane-urea polymer [MDI / polytetramethylene ether glycol [PTMEG] / diamine chain extender]; spun fiber is taken up on bobbins and passes through a series of finish applicators before winding; the fiber finish is a critical component of the Lycra® manufacturing process — it controls: fiber-to-fiber friction [prevents inter-yarn adhesion during winding], fiber-to-metal friction [enables smooth passage over yarn guides], antistatic properties [eliminates static charge buildup on the fiber], and surface pH [prevents acid-catalyzed polyurethane ether linkage hydrolysis during storage]; NEM serves as the alkaline pH modifier component of the fiber finish bath, maintaining finish bath pH at 8.5–9.5 to prevent acid hydrolysis of the polyurethane-urea backbone during ambient temperature storage and process humidity exposure; NEM concentration in the finish bath: approximately 0.5–2.0 weight% NEM in aqueous/oil finish emulsion; finish bath is maintained at 55–65°C to ensure uniform application viscosity; NEM VP at 60°C approximately 20–25 mmHg produces significant vapor concentration in the finish bath headspace; principal NEM exposure tasks: finish bath makeup [NEM addition to 200-L finish bath tank heated to 60°C; 4.0–7.0 ppm at tank opening during addition], spinning line wetting applicator [spandex fiber passes through NEM-containing finish applicator rollers; vapor at yarn guide positions throughout spinning hall; 2.5–5.0 ppm at yarn guide level], finish bath maintenance [top-up addition of NEM concentrate from 20-L carboys; 3.0–5.5 ppm at liquid addition point]; 8-hr TWA: approximately 6.0 ppm; monitored by Photovac Voyager PID [10.6 eV lamp; NEM CF ≈ 1.14; ÷10 perturbation at EHS Insight ingestion layer]; displayed 0.60 ppm / actual 6.0 ppm).

The Surface 3 subject is a 47-year-old male spandex fiber finishing operator at INVISTA Wichita KS (18-year INVISTA tenure; primary NEM tasks: finish bath makeup [NEM addition to 200-L finish bath tank via open carboy pour; heated tank at 60°C; 4–7 ppm at tank opening; 20–30 min/shift]; spinning line applicator inspection [visual and tactile inspection of finish applicator rollers along spinning hall; ambient NEM vapor from applicator; 2.5–5.0 ppm; approximately 4 hr/day]; finish bath top-up [NEM concentrate addition from 20-L carboys during production; 3–5.5 ppm; 30–45 min/day]; task-averaged 8-hr TWA approximately 6.0 ppm; SKIN: liquid NEM from finish bath tank opening and carboy pouring operations — aqueous NEM finish bath solution contacts forearms during tank maintenance [log P 0.78; aqueous NEM solution; nitrile glove BTT <20 min; significant dermal NEM absorption through aqueous route]; EHS Insight output: "Photovac Voyager PID N-ethylmorpholine NEM (INVISTA Wichita KS spandex fiber finishing; 8-hr TWA): 0.60 ppm. OSHA 20 ppm: 0.60/20 = 3.0% — within PEL; no action. NIOSH 5 ppm: 0.60/5 = 12.0% — within REL; no action. ACGIH Advisory 5 ppm SKIN A4: 0.60/5 = 12.0% — within advisory; no action." At actual 6.0 ppm: ACGIH TLV-TWA 1.2× exceeded at 8-hr average; finish bath makeup peaks at 4–7 ppm represent repeated corneal vapor irritation events above the 5 ppm TLV; SKIN from aqueous NEM finish bath solution on forearms during tank maintenance: not assessed; NIOSH=ACGIH provides no independent protection layer above 5 ppm; OSHA 4× gap masks 6 ppm actual as 3% of OSHA PEL; 18-year cumulative above-TLV SKIN + vapor NEM exposure undetected.

Consequence pathway: NEM 6.0 ppm (ACGIH TLV-TWA 1.2×) masked as 0.60 ppm; EHS Insight AI: "OSHA 3.0%; NIOSH 12.0%; ACGIH advisory 12.0% — no action"; 47M 18yr INVISTA Wichita KS spandex fiber finishing operator; corneal edema risk above ACGIH TLV not flagged; SKIN from aqueous NEM finish bath forearm contact during tank maintenance unquantified; NIOSH=ACGIH zero-independent-protection; OSHA 4× gap masks 18-year above-TLV occupational NEM exposure as continuously compliant.

Integrating Glyphward into N-Ethylmorpholine Occupational Monitoring Pipelines

Glyphward integrates as a pre-scan gate at every NEM PID monitor data ingestion point — before Cority at Huntsman Corp Woodlands TX, before VelocityEHS at Corteva Johnston IA, and before EHS Insight at INVISTA Wichita KS. Threshold 21 reflects: OSHA 4× gap [1971-frozen 20 ppm vs ACGIH 2001-revised 5 ppm] + NIOSH=ACGIH zero-independent-protection [NIOSH REL 5 ppm = ACGIH TLV 5 ppm; both 4× below OSHA; zero additional NIOSH protection above ACGIH level; AI three-metric display misleadingly implies independent confirmation] [6 pts]; corneal edema above ACGIH TLV + SKIN notation [log P 0.78 aqueous-phase dermal route; nitrile glove BTT <20 min] + pKₐ 7.67 tissue-permeable unprotonated amine fraction [4 pts]; three sectors [5 pts]; three sites [3 pts]; FIRST [3 pts]. Total: 21.

import asyncio
import hashlib
from enum import StrEnum, auto
from pathlib import Path
import httpx

GLYPHWARD_API = "https://api.glyphward.com/v1/scan"
GLYPHWARD_KEY = "gw_live_..."
NEM_THRESHOLD = 21  # OSHA 20 ppm TWA (1971 frozen) vs ACGIH 5 ppm SKIN A4 (4× gap); NIOSH=ACGIH zero independent protection

chemical = "N-ethylmorpholine_NEM_CAS_100-74-3"
osha_pel_ppm = 20        # 1971 frozen; adopted from pre-corneal-edema-data 1968 ACGIH TLV; 4× above ACGIH/NIOSH
acgih_tlv_ppm = 5        # 2001 revision; SKIN A4; corneal edema above TLV; 4× below OSHA
acgih_limit_type = "TLV-TWA"  # 8-hr TWA — distinct from TBA ceiling type
niosh_rel_ppm = 5        # NIOSH=ACGIH; zero independent NIOSH protection above ACGIH 5 ppm level

class NEMContext(StrEnum):
    HUNTSMAN_WOODLANDS_TX_PU_FOAM      = auto()  # Surface 1 (MiniRAE 3000 PID; 8.0→0.80 ppm; 44M 15yr)
    CORTEVA_JOHNSTON_IA_AGROCHEMICAL   = auto()  # Surface 2 (Dräger X-am 5600; 7.0→0.70 ppm; 39F 11yr)
    INVISTA_WICHITA_KS_SPANDEX         = auto()  # Surface 3 (Photovac Voyager; 6.0→0.60 ppm; 47M 18yr)

class AdversarialNEMError(RuntimeError):
    def __init__(self, surface: NEMContext, score: int, frame_hash: str):
        super().__init__(
            f"NEM adversarial AI detected [{surface}] "
            f"score={score}/{NEM_THRESHOLD} hash={frame_hash}"
        )

async def scan_nem_monitor_frame(image_path: Path, surface: NEMContext) -> dict:
    async with httpx.AsyncClient(timeout=10) as client:
        image_bytes = image_path.read_bytes()
        frame_hash = hashlib.sha256(image_bytes).hexdigest()[:16]
        resp = await client.post(
            GLYPHWARD_API,
            headers={"X-Api-Key": GLYPHWARD_KEY},
            json={
                "image_b64": __import__("base64").b64encode(image_bytes).decode(),
                "context": surface,
                "chemical": chemical,
                "osha_pel_ppm": osha_pel_ppm,
                "acgih_tlv_ppm": acgih_tlv_ppm,
                "acgih_limit_type": acgih_limit_type,
                "niosh_rel_ppm": niosh_rel_ppm,
                "osha_4x_gap": True,          # OSHA 20 ppm vs ACGIH/NIOSH 5 ppm
                "niosh_equals_acgih": True,   # CRITICAL: NIOSH=ACGIH; zero independent NIOSH protection
                "skin_notation_acgih": True,  # log P 0.78; aqueous-phase dermal route
                "corneal_edema_above_tlv": True,
                "threshold": NEM_THRESHOLD,
            },
        )
        result = resp.json()
        if result["score"] >= NEM_THRESHOLD:
            raise AdversarialNEMError(surface, result["score"], frame_hash)
        return result

See also: Tributylamine TBA CAS 102-82-9 — OSHA No PEL Enforcement Vacuum + ACGIH TLV-C 0.5 ppm SKIN A4 Ceiling (Rubber Accelerator; Pharmaceutical; Water Treatment) · Triethylamine TEA — OSHA PEL 25 ppm TWA vs ACGIH TLV-TWA 1 ppm A4 SKIN (25× Gap; Corneal Vascularization) · Glyphward scanner · All adversarial injection patterns