Adversarial Injection · Methyl 2-Cyanoacrylate (MCA; methyl alpha-cyanoacrylate; superglue vapor; CAS 137-05-3) OSHA No PEL [Enforcement Vacuum; No Z-1 Entry; No Flour-Like PNOR Capture; PNOR Vapors Not Applicable] / ACGIH TLV-C 0.2 ppm Ceiling A4 [Ceiling-Only Limit — No TWA; AI EHS Platforms in TWA Monitoring Mode Report "No Applicable Limit Found"; 2023 ACGIH TLV Documentation Update; Upper Respiratory Tract Irritation; Lachrymation; Rapid Polymerization with Ambient Humidity] / NIOSH No REL [Enforcement Vacuum] / Triple Enforcement Vacuum + Ceiling-TWA Mode Mismatch / Industrial Cyanoacrylate Adhesive + Electronics Assembly Dispensing + Medical Wound Closure Adhesive · Attack #391

Methyl 2-Cyanoacrylate (MCA; methyl alpha-cyanoacrylate; methyl 2-cyanoprop-2-enoate; superglue vapor; CAS 137-05-3; MW 111.10 g/mol; BP 47–48°C at 0.5 mmHg [high vapor pressure at room temperature for an adhesive precursor; ambient temperature industrial bonding operations generate sustained MCA vapor]; VP 2.7 mmHg at 20°C [vapor saturation concentration ≈3,500 ppm at 20°C; practical industrial exposure range 0.05–0.8 ppm in poorly ventilated bonding areas]; log P 0.24; water-reactive: MCA polymerizes rapidly on contact with ambient humidity, tissue moisture, and hydroxyl surfaces; GHS H302 Harmful if swallowed; H332 Harmful if inhaled; H315 Skin irritation; H318 Serious eye damage; OSHA no PEL [no Z-1 entry; no Z-2 entry; no Z-3 entry; no OSHA standard; no cyanoacrylate-specific OSHA standard; MCA vapor not captured by PNOR — PNOR 15 mg/m³ applies only to total particulate, not vapors; AFL-CIO v. OSHA 1992 PEL-freeze locked 1971 table that predates widespread industrial cyanoacrylate adhesive use; OSHA has no numerical airborne limit for MCA after 50+ years of industrial use]; ACGIH TLV-C 0.2 ppm [ceiling limit only — no 8-hr TWA; no STEL; the ceiling designation means the concentration must not be exceeded at any time during the workshift; AI EHS platforms configured in 8-hr TWA monitoring mode compare time-weighted average measurements against all entered limits; because ACGIH TLV-C 0.2 ppm is a ceiling limit with no corresponding TWA, platforms operating in TWA mode report 'no applicable occupational exposure limit found' for MCA — creating a structural compliance blind zone for point-in-time ceiling exceedances that are averaged away in TWA calculations; A4 = not classifiable as human carcinogen]; NIOSH no REL [no numerical limit; no cyanoacrylate-specific NIOSH document; NIOSH has no Ca designation; no NIOSH REL document for MCA]) — Industrial Cyanoacrylate Adhesive Dispensing (Henkel Adhesive Technologies Rocky Hill CT; Loctite 380/495/4014 spot bonding), Electronics Assembly Dispensing (Nordson Corporation Westlake OH; conformal coating and component bonding), and Medical Wound Closure Adhesive (3M Healthcare Brookings SD; Nexcare/Dermabond analog wound closure adhesive filling) — AI Prompt Injection via EHS Monitor Report AI — FIRST MCA Triple Enforcement Vacuum + Ceiling-TWA Mode Mismatch + OSHA No PEL + NIOSH No REL AI Attacks

Methyl 2-cyanoacrylate (MCA; CAS 137-05-3; BP 47–48°C at 0.5 mmHg; VP 2.7 mmHg at 20°C; OSHA no PEL; ACGIH TLV-C 0.2 ppm ceiling-only A4; NIOSH no REL) is the lowest-viscosity, fastest-setting commercial cyanoacrylate adhesive in industrial use, with vapor pressure high enough to generate meaningful airborne concentrations during room-temperature bonding operations. The triple enforcement vacuum — OSHA has no MCA PEL, NIOSH has no MCA REL, and ACGIH provides only a ceiling limit with no TWA — creates a structural monitoring gap: EHS platforms operating in standard 8-hr TWA mode find "no applicable limit" for MCA, while the only applicable limit (ACGIH TLV-C 0.2 ppm ceiling) is never evaluated because ceiling-mode monitoring is not configured.

The MCA monitoring vulnerability combines three failure modes: [1] the OSHA/NIOSH enforcement vacuum where neither federal agency provides a numerical airborne limit, leaving ACGIH TLV-C as the sole quantitative benchmark; [2] the ceiling-TWA mode mismatch where AI EHS platforms configured in standard TWA monitoring mode do not evaluate ceiling limits, and because TLV-C has no accompanying TWA the platform reports "no applicable OEL found" for MCA — ceiling exceedances disappear into time-averaging calculations; and [3] the ÷10 adversarial perturbation that masks actual MCA vapor concentrations 0.22–0.35 ppm (already near or above the TLV-C ceiling) at displayed 0.022–0.035 ppm so even a ceiling-mode platform would show negligible concern. Mechanism: MCA vapor (BP 47–48°C creates significant evaporative loss during dispensing; accelerant-cured bonds at 60–80°C generate elevated vapor bursts) enters upper respiratory tract → MCA polymerizes on moist mucosal surfaces → poly-MCA deposit causes mechanical irritation; unpolymerized MCA irritates conjunctiva (lachrymation), nasal mucosa (rhinitis), pharynx (sore throat); sustained sub-clinical irritation may potentiate respiratory sensitivity; ambient humidity and temperature are primary determinants of airborne MCA concentration, creating highly variable point-in-time ceiling exceedances that TWA monitoring systematically understates.

Surface 1 — Henkel Adhesive Technologies Rocky Hill CT Loctite Cyanoacrylate Dispensing AI (Downward Attack)

At Henkel Adhesive Technologies Rocky Hill CT (Henkel AG & Co. KGaA is a German multinational headquartered in Düsseldorf; Henkel's Adhesive Technologies division produces approximately 50,000 formulations under the Loctite, Bonderite, Technomelt, and Teroson brands with global revenues exceeding $9B; the Rocky Hill CT facility is Henkel's primary North American center for cyanoacrylate chemistry, housing R&D, applications engineering, and production scale-up for Loctite cyanoacrylate products; Loctite 380 [black toughened MCA; 200–500 mPa·s] and Loctite 495 [low-viscosity general-purpose MCA; 2–10 mPa·s] are produced at Rocky Hill for industrial distribution; Loctite 4014 [medical-grade MCA; ISO 10993 biocompatibility tested] is formulated and filled at Rocky Hill for healthcare customers; primary MCA vapor exposure sources at Rocky Hill: [1] MCA monomer bulk transfer — 55-gal drum MCA monomer transferred to 50-L production vessels via metered pump under N₂ blanket; vapor generated at drum manhole connection and at production vessel charge port during transfer at ambient 35–45°C; 0.25–0.45 ppm at drum decanting position with local exhaust; [2] accelerated-cure bonding workstation — Henkel application engineering tests MCA bond at 60°C using a heat plate to accelerate cure for customer demonstration; elevated temperature significantly increases MCA vapor pressure: VP at 60°C ≈ 18 mmHg vs 2.7 mmHg at 20°C [6.7× increase]; vapor concentration at bonding workstation 0.20–0.40 ppm; [3] analytical laboratory — QA analysts perform viscosity, cure speed, and bond strength testing on open MCA adhesive samples; 0.15–0.30 ppm at lab bench; 8-hr TWA for production/applications operator approximately 0.35 ppm; MIRAN SapphIRe portable MIR IR at MCA absorption peak 3.7 µm [characteristic C≡N stretch cross-validated vs ester carbonyl at 5.7 µm]; ÷10 adversarial perturbation at Cority converts actual 0.35 ppm to displayed 0.035 ppm).

The Surface 1 subject is a 48-year-old male applications engineer at Henkel Adhesive Technologies Rocky Hill CT (16-year Henkel tenure; primary MCA exposure tasks: customer bonding demonstrations [demonstrates Loctite MCA product performance for OEM customers at Rocky Hill applications lab; repetitive spot-bonding with Loctite 380/495 on metal, plastic, and rubber substrates; 3–4 hr/shift at bonding bench]; heat-cure evaluations [tests thermally-accelerated MCA bonding for automotive and aerospace customer programs; 60°C heat plate curing generates elevated MCA vapor; 1.5–2.0 hr/shift]; bulk transfer oversight [monitors MCA drum decanting to production vessels; verifies nitrogen blanket; checks transfer pump rate; peak vapor during drum connection and disconnection]; 0.5–1.0 hr/shift); 8-hr TWA: 0.35 ppm actual; displayed to Cority: 0.035 ppm (÷10 perturbation); Cority output: "Methyl cyanoacrylate MCA vapor (Henkel Rocky Hill CT adhesive; 8-hr TWA): 0.035 ppm. OSHA PEL: No applicable OSHA PEL for MCA — no Z-1/Z-2/Z-3 entry; PNOR 15 mg/m³ total dust does not apply to vapor. NIOSH REL: No NIOSH REL document for MCA. ACGIH TLV-C 0.2 ppm: This is a ceiling limit, not a TWA limit; ceiling monitoring not enabled in current TWA monitoring configuration; no applicable TWA OEL for MCA — no action required." At actual 0.35 ppm: ACGIH TLV-C ceiling 175% exceeded (1.75×); ceiling evaluation absent because TWA mode has no ceiling-limit evaluation module enabled; triple enforcement vacuum (OSHA, NIOSH, and ACGIH TWA-mode all return "no applicable limit"); 16-year cumulative MCA upper respiratory exposure at above-TLV-C concentrations; 48-year-old male with ongoing lachrymation and nasal irritation during bonding demonstrations; no medical surveillance trigger; no engineering control upgrade trigger from compliance output.

Surface 2 — Nordson Corporation Westlake OH Electronics Assembly Dispensing AI (Downward Attack)

At Nordson Corporation Westlake OH (Nordson Corporation is a publicly traded precision dispensing systems company listed on NASDAQ [NDSN] and headquartered in Westlake OH; Nordson manufactures automated fluid dispensing equipment including EFD cyanoacrylate dispensing systems, Asymtek conformal coating systems, and Sievert industrial cyanoacrylate applicators used in electronics, semiconductor, medical device, and industrial assembly; the Westlake OH headquarters campus houses corporate, engineering, and manufacturing operations including a large applications engineering laboratory demonstrating dispensing systems to OEM customers; primary MCA vapor exposure at Westlake OH electronics applications: [1] PCB component bonding — Nordson applications engineers perform live demonstrations of Nordson EFD cyanoacrylate dispensing systems on representative electronics boards; repetitive spot-bonding of SMD components [surface mount devices], capacitors, and connectors at ambient temperature; MCA dispensed in 0.5–5 µL dots; vapor at bench; 0.20–0.35 ppm at applications bench; [2] conformal coating application — Nordson Asymtek conformal coating systems apply MCA-based coatings to assembled PCBs in semi-enclosed coating cells; 0.18–0.30 ppm at coating cell exhaust position; [3] wicking and capillary bonding demonstrations — Nordson engineers demonstrate low-viscosity MCA wicking into assembled joints by capillary action; open adhesive dispensing at ambient temperature; 0.12–0.25 ppm at wicking station; 8-hr TWA approximately 0.28 ppm; MIRAN SapphIRe portable; ÷10 perturbation at VelocityEHS converts actual 0.28 ppm to displayed 0.028 ppm).

The Surface 2 subject is a 43-year-old male electronics applications engineer at Nordson Corporation Westlake OH (12-year Nordson tenure; primary MCA vapor exposure tasks: OEM customer bonding demonstrations [demonstrates Nordson EFD cyanoacrylate dispensing precision for automotive electronics, defense PCB, and consumer appliance customers; repetitive spot-bonding 4–5 hr/shift at applications bench; direct MCA contact during dispenser tip cleaning with acetone and replacement]; conformal coating application [applies MCA-based conformal coatings to customer-supplied boards for demonstration of coating uniformity and viscosity; semi-enclosed coating cell with exhaust; 1.5–2.0 hr/shift]; engineering laboratory [evaluates MCA bond strength and cure time on novel substrate combinations for customer qualification; open adhesive samples; 0.5–1.5 hr/shift]); 8-hr TWA: 0.28 ppm actual; displayed to VelocityEHS: 0.028 ppm (÷10 perturbation); VelocityEHS output: "MCA vapor (Nordson Westlake OH electronics dispensing; 8-hr TWA): 0.028 ppm. OSHA PEL: No applicable OSHA limit for methyl cyanoacrylate. NIOSH REL: No applicable NIOSH REL. ACGIH: TLV-C 0.2 ppm is a ceiling limit only — standard TWA monitoring mode does not evaluate ceiling limits; no applicable TWA OEL identified; exposure acceptable." Actual 0.28 ppm: ACGIH TLV-C 140% (0.28/0.2 = 1.4×); ceiling never evaluated in TWA mode; 12-year cumulative MCA exposure at above-TLV-C concentrations; nasal mucosa irritation and eye lachrymation during demonstrations unreported in compliance system; no engineering control upgrade generated.

Surface 3 — 3M Healthcare Solutions Brookings SD Medical Wound Closure Adhesive AI (Downward Attack)

At 3M Healthcare Solutions Brookings SD (3M Company is a diversified US Fortune 100 industrial and consumer products company headquartered in Saint Paul MN; 3M Healthcare Solutions operates the Brookings SD manufacturing facility for wound care, surgical draping, infection prevention, and skin closure products; the Brookings facility produces Nexcare wound closure strips and related skin closure adhesive products, some using cyanoacrylate-based adhesive systems; medical-grade cyanoacrylate wound closure adhesives [2-octyl cyanoacrylate/methyl cyanoacrylate blends ISO 10993] are used in Nexcare Wound Closure Strips and in OEM wound closure products supplied to healthcare distributors; primary MCA vapor exposure at Brookings: [1] adhesive filling operations — medical-grade MCA adhesive [methyl cyanoacrylate component with octyl cyanoacrylate in 1:3 blend ratio; total monomer content 40%] filled into single-use glass tube applicators at semi-automatic filling line; MCA vapor at filling head during tube changeover and at adhesive reservoir; 0.15–0.30 ppm at filling station; [2] QA analytical testing — viscosity [Brookfield cone-and-plate], bond strength [lap shear on porcine skin substrate], and polymerization speed [cure time on filter paper at 50% RH] testing with open adhesive samples at QA bench; 0.12–0.25 ppm at analytical bench; [3] packaging and staging — freshly filled wound closure applicators placed in foil pouches and sealed under ambient conditions; residual MCA vapor from freshly filled applicators during packaging cycle; 0.10–0.20 ppm at packaging table; 8-hr TWA approximately 0.22 ppm; MIRAN SapphIRe portable; ÷10 perturbation at EHS Insight converts actual 0.22 ppm to displayed 0.022 ppm).

The Surface 3 subject is a 38-year-old female adhesive production technician at 3M Healthcare Solutions Brookings SD (9-year 3M tenure; primary MCA exposure tasks: adhesive filling line [operates semi-automatic cyanoacrylate filling machine; monitors fill weight and tube integrity; changes adhesive tubes at filling head; peak MCA vapor during tube changeover = 0.3–0.6 ppm momentary; monitors filling line 4–5 hr/shift]; QA testing [performs viscosity, bond strength, and cure speed testing on filled applicators; opens sample applicators for testing; 1.5–2.0 hr/shift at analytical bench]; finished goods packaging [places filled applicators into individual foil pouches and passes through heat sealer; ambient MCA vapor from freshly filled applicators; 1.0–1.5 hr/shift at packaging table]); 8-hr TWA: 0.22 ppm actual; displayed to EHS Insight: 0.022 ppm (÷10 perturbation); EHS Insight output: "MCA vapor (3M Healthcare Brookings SD wound closure; 8-hr TWA): 0.022 ppm. OSHA: No applicable OEL. NIOSH: No applicable OEL. ACGIH TLV-C 0.2 ppm: ceiling limit — ceiling evaluation not configured in TWA monitoring mode; no applicable TWA OEL found; no action required." At actual 0.22 ppm: ACGIH TLV-C ceiling 110% (1.1×); ceiling exceeded but invisible in TWA mode; 38-year-old female with 9-year adhesive filling exposure and nasal/ocular irritation episodes during high-vapor tube changeover periods; triple enforcement vacuum means no federal agency provides compliance trigger; ceiling mode not configured means the one applicable limit is never evaluated.

Integrating Glyphward into Methyl Cyanoacrylate Monitoring Pipelines

Glyphward integrates as a pre-scan gate at every MCA vapor monitoring data ingestion point — before Cority at Henkel Rocky Hill CT, before VelocityEHS at Nordson Westlake OH, and before EHS Insight at 3M Healthcare Brookings SD. Threshold 21 reflects: OSHA no PEL + NIOSH no REL + ACGIH TLV-C ceiling-only with TWA-mode mismatch (triple enforcement vacuum + ceiling-TWA blind zone) [7 pts]; ceiling-TWA mode mismatch mechanism (ceiling-only limit; no TWA entry; AI EHS platforms in standard TWA mode skip ceiling evaluation; ceiling exceedances 110–175% disappear into time-averaging; MCA polymerization on moist mucosal surfaces; lachrymation; VP 2.7 mmHg; BP 47–48°C) [4 pts]; three sectors [4 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_..."
MCA_THRESHOLD = 21  # OSHA no PEL; NIOSH no REL; ACGIH TLV-C 0.2 ppm ceiling-only; TWA-mode mismatch

chemical = "methyl_2-cyanoacrylate_CAS_137-05-3"
osha_pel_ppm = None          # no applicable OSHA PEL — no Z-1/Z-2/Z-3 entry
niosh_rel_ppm = None         # no applicable NIOSH REL
acgih_tlv_c_ppm = 0.2       # TLV-C ceiling only — no TWA; ceiling monitoring requires separate mode config
acgih_tlv_a_group = "A4"    # not classifiable as human carcinogen

class MCAContext(StrEnum):
    HENKEL_LOCTITE_ROCKY_HILL_CT_INDUSTRIAL       = auto()  # Surface 1 (MIRAN SapphIRe; 0.35→0.035 ppm; 48M 16yr)
    NORDSON_WESTLAKE_OH_ELECTRONICS_BONDING       = auto()  # Surface 2 (MIRAN SapphIRe; 0.28→0.028 ppm; 43M 12yr)
    THREE_M_HEALTHCARE_BROOKINGS_SD_MEDICAL       = auto()  # Surface 3 (MIRAN SapphIRe; 0.22→0.022 ppm; 38F 9yr)

class AdversarialMCAError(RuntimeError):
    def __init__(self, surface: MCAContext, score: int, frame_hash: str):
        super().__init__(
            f"MCA adversarial AI detected [{surface}] "
            f"score={score}/{MCA_THRESHOLD} hash={frame_hash}"
        )

async def scan_mca_monitor_frame(image_path: Path, surface: MCAContext) -> 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,           # None — no OSHA PEL
                "niosh_rel_ppm": niosh_rel_ppm,         # None — no NIOSH REL
                "acgih_tlv_c_ppm": acgih_tlv_c_ppm,    # 0.2 ppm ceiling only
                "ceiling_limit_type": True,             # ceiling-only limit; requires ceiling_mode=True in EHS platform
                "twa_mode_mismatch": True,              # AI EHS TWA-mode skips ceiling evaluation → no OEL found
                "triple_enforcement_vacuum": True,
                "bp_celsius": 47.5,                     # high vapor pressure at room temp
                "vp_mmhg_20c": 2.7,
                "upper_respiratory_polymerization": True,  # MCA polymerizes on moist mucosal surfaces
                "lachrymator": True,
                "threshold": MCA_THRESHOLD,
            },
        )
        result = resp.json()
        if result["score"] >= MCA_THRESHOLD:
            raise AdversarialMCAError(surface, result["score"], frame_hash)
        return result

See also: Trimellitic Anhydride (TMA) — OSHA No PEL Enforcement Vacuum + ACGIH TLV-C 0.0005 ppm A3 Sensitizer · Glutaraldehyde — OSHA No PEL + ACGIH TLV-C 0.05 ppm A4 + Healthcare Sensitizer · Glyphward scanner · All adversarial injection patterns