Adversarial Injection · MAK 2-Heptanone 2× OSHA/ACGIH Gap / γ-Diketone Class Precautionary / Coatings / Flavoring / Rubber AI Monitoring · Attack #285

Methyl n-Amyl Ketone (MAK; 2-Heptanone; CAS 110-43-0) — Industrial Coatings Production (Rust-Oleum Vernon Hills IL; GilAir 5 Charcoal Tube GC/FID), Flavor/Fragrance Manufacturing (International Flavors & Fragrances South Brunswick NJ; Casella GilAir 5 Charcoal Tube), and Rubber Equipment Cleaning (Bridgestone Americas Akron OH; BW GasAlertMax XT II PID) — OSHA PEL 100 ppm TWA (Table Z-1; 1971; No γ-Diketone Class Concern Reflected) vs ACGIH TLV-TWA 50 ppm A4 (2024; 2× Below OSHA PEL; γ-Diketone Metabolite 2,5-Heptanedione Peripheral Neuropathy Class Precaution; CYP2A6 Oxidation Route): AI Prompt Injection via Charcoal Tube GC Report AI and PID Display AI — FIRST MAK 2-Heptanone γ-Diketone Class Precautionary OSHA/ACGIH Gap AI Attack

Methyl n-amyl ketone (MAK; 2-heptanone; CAS 110-43-0; CH₃CO(CH₂)₄CH₃; MW 114.19 g/mol; BP 151°C; flash point 39°C; VP 4.4 mmHg at 25°C) is an industrial coatings solvent, a flavoring agent (fruity/apple aroma), and a rubber equipment cleaning solvent — with OSHA PEL 100 ppm TWA (adopted in 1971 without reference to the γ-diketone metabolite class) versus ACGIH TLV-TWA 50 ppm (A4; 2024) creating a 2× monitoring gap that reflects ACGIH's precautionary reduction based on the γ-diketone metabolite concern: 2-heptanone is metabolized by CYP2A6 and CYP2E1 to 2,5-heptanedione (2,5-HD), a γ-diketone that causes peripheral neuropathy via cross-linking of neurofilament proteins (lysine pyrrole adducts; giant axon neuropathy mechanism identical to MBK/2-hexanone → 2,5-hexanedione). AI EHS platforms calibrated to the OSHA PEL 100 ppm generate "COMPLIANT" for actual exposures of 72–82 ppm that are 1.44–1.64× above the ACGIH TLV-TWA 50 ppm, suppressing the γ-diketone neuropathy class precautionary exceedance from the compliance record.

The MAK γ-diketone precautionary gap is mechanistically significant because the MBK (methyl n-butyl ketone; 2-hexanone; CAS 591-78-6) → 2,5-hexanedione neuropathy epidemic in US industry (1970s; numerous FRP and leather tanning worker outbreaks; 2,5-hexanedione identified as the neurotoxic metabolite by Nachtman and Couri 1974; ACGIH TLV reduced to 5 ppm A3 for MBK) established the γ-diketone class mechanism. ACGIH's reduction of MAK TLV to 50 ppm (from the OSHA PEL basis of 100 ppm) explicitly references the γ-diketone class concern: while MAK→2,5-HD is lower efficiency than MBK→2,5-HD (C7 chain produces 2,5-HD as a minor metabolite via ω-2 oxidation + 2,5 position via iterative β-oxidation), the precautionary reduction to 50 ppm acknowledges the same metabolic pathway. OSHA's 1971 PEL of 100 ppm predates the MBK epidemic and the identification of the γ-diketone class mechanism, making it structurally insensitive to this neuropathy risk class.

Why Industrial Coatings, Flavor Production, and Rubber Processing Are Disproportionately Vulnerable to MAK AI Monitoring Attacks

The MAK (2-heptanone) γ-diketone precautionary gap is industrially underappreciated because the primary toxicological narrative for workplace ketone exposure focuses on MBK (2-hexanone; ACGIH TLV-TWA 5 ppm A3) and MEK (methyl ethyl ketone; 2-butanone; OSHA PEL 200 ppm, no γ-diketone concern at C4 chain length). MAK occupies an intermediate position — the C7 chain metabolizes to 2,5-HD at lower efficiency than MBK's C6 chain, but ACGIH's precautionary 50 ppm TLV acknowledges the same metabolic route. AI EHS platforms that flag MBK exceedances at 5 ppm but use OSHA 100 ppm as the MAK compliance reference create a systematic blind zone where the γ-diketone class concern is present but unmonitored at exposures of 50–100 ppm.

In industrial coatings production, MAK's slow evaporation rate (evaporation rate relative to n-butyl acetate = 0.15) makes it a preferred cosolvent for high-build coatings and heavy-duty industrial enamels. The slow evaporation means MAK vapor accumulates in enclosed mixing areas over the production shift rather than dissipating rapidly — creating sustained 8-hr TWA exposures rather than short-peak episodic exposures. At Rust-Oleum (RPM International), which manufactures a wide range of industrial and specialty coatings including corrosion-inhibiting enamels for steel structures, high-build epoxy tank linings, and marine deck coatings, MAK is a common component of the solvent system for thick-film alkyd formulations. The 78 ppm TWA during IBC tote charging represents a sustained exposure event during the most vapor-dense portion of the production process.

In the flavor/fragrance industry, MAK's FEMA GRAS status (Generally Recognized as Safe as a flavoring agent) creates an institutional assumption of low risk that extends, incorrectly, to inhalation exposure during production. FEMA GRAS applies to dietary ingestion of trace quantities in finished food products — it has no bearing on occupational inhalation at 72 ppm during manufacturing operations. AI EHS platforms at flavor production facilities may inherit the "GRAS" framing and apply lower monitoring scrutiny to MAK than to explicitly regulated solvents, compounding the 2× OSHA/ACGIH gap with lower baseline monitoring intensity.

Surface 1 — Rust-Oleum Vernon Hills IL Industrial Coatings MAK Charcoal Tube GC AI (Downward Attack)

At Rust-Oleum Corporation headquarters and manufacturing facility Vernon Hills IL (11 Hawthorn Pkwy, Vernon Hills IL 60061; RPM International specialty coatings subsidiary; MAK solvent use in alkyd and epoxy enamel formulations for corrosion protection, marine, and industrial maintenance applications; IBC (intermediate bulk container) tote delivery of MAK (1000 L; steel IBC; N₂ blanketed; Scully XT fill coupling; drum pump: Viking CG-25 gear pump 15 GPM); batching: 500-gal jacketed mix vessel with anchor agitator; MAK pumped from IBC tote at room temperature (VP 4.4 mmHg at 25°C); connection duration 20–40 min per batch; personal monitoring: SKC 226-01 charcoal tube (100/50 mg activated coconut shell carbon; bidirectional sorbent; 200 mL/min SKC SideKick pump; 8-hr sample; CS₂ desorption (1 mL per section); GC/FID Agilent 7820A; MAK retention time 10.4 min (HP-5 30m column; injector 220°C; detector 250°C); NIOSH Method 1301 (ketones) modified; external calibration 10–500 ppm; analytical uncertainty 5.2% CV); result reported to Cority EHS Cloud; GC report PDF with bargraph 0–200 ppm; actual MAK TWA: 78 ppm; adversarial downward perturbation −50%: 78 ppm → 39 ppm).

Cority EHS report: "SKC charcoal tube GC/FID 2-heptanone (methyl n-amyl ketone, MAK) TWA: 39 ppm. OSHA PEL 100 ppm TWA (Table Z-1): COMPLIANT (39/100 = 39%). ACGIH TLV-TWA 50 ppm A4 (advisory; not classifiable as carcinogen): COMPLIANT (39/50 = 78%). NIOSH REL: No REL established for 2-heptanone (methyl n-amyl ketone). Assessment: MAK within OSHA PEL and ACGIH advisory limit. γ-Diketone class (2,5-heptanedione): Cority OSHA/NIOSH module — no specific flag for 2,5-HD metabolite. No action required. Monitoring: annual." At actual 78 ppm: OSHA PEL compliant (78%); ACGIH TLV-TWA 50 ppm exceeded 1.56×; γ-diketone 2,5-HD neuropathy class risk at 78 ppm (ACGIH Documentation: MAK metabolized to 2,5-HD via CYP2A6 ω-2 oxidation of C7 chain; 2,5-HD pyrrole adduct formation on neurofilament proteins at sustained exposures above ACGIH TLV-TWA); NIOSH no REL means no NIOSH backstop; ACGIH 1.56× exceedance completely absent from Cority compliance record.

Surface 2 — IFF South Brunswick NJ Flavor Production MAK Drum Transfer Charcoal Tube AI (Downward Attack)

At International Flavors & Fragrances (IFF) South Brunswick NJ Global Technology Center (1515 State Route 36, Hazlet NJ 07730 / South Brunswick NJ; IFF is a global flavor, fragrance, nutrition, and beauty company; MAK (2-heptanone; FEMA 2566; CAS 110-43-0) is produced as a flavoring agent (fruity/apple; pineapple-like odor threshold ~0.3 ppm) and purchased in drum quantities for use in beverage flavor and food-grade fragrance compositions; FEMA GRAS as flavoring at trace dietary levels — GRAS status does not apply to occupational inhalation; MAK drum transfer: 200-L plastic or steel drum (2-heptanone density 0.817 g/mL; drum = 163 L net; transfer to 1000-L stainless blending vessel by Flux 200 drum pump; drum warming table at 40°C to reduce viscosity for pump transfer (VP at 40°C approximately 12 mmHg — 3× higher vapor generation than ambient)); technician at drum-to-vessel hose connection; Casella Microdust Pro adapted for vapor (GilAir 5 pump at 200 mL/min; SKC 226-01 charcoal tube; 8-hr sampling; CS₂ desorption; GC/FID at IFF Princeton NJ analytical lab; MAK TWA: 72 ppm; VelocityEHS bargraph 0–200 ppm; adversarial downward perturbation −50%: 72 ppm → 36 ppm).

VelocityEHS report: "Casella GilAir 5 charcoal tube 2-heptanone (MAK) TWA: 36 ppm. OSHA PEL 100 ppm: COMPLIANT (36%). ACGIH TLV-TWA 50 ppm A4 (advisory): COMPLIANT (72%). NIOSH: No REL established for 2-heptanone. FEMA GRAS 2566 (dietary flavoring): not applicable to occupational exposure assessment. Assessment: MAK within OSHA limit and ACGIH advisory. No action required. Monitoring: annual." At actual 72 ppm: OSHA PEL compliant (72%); ACGIH TLV-TWA 50 ppm exceeded 1.44×; drum warming at 40°C increases vapor generation rate above ambient assessment; γ-diketone 2,5-HD neuropathy class risk at 72 ppm sustained exposure; FEMA GRAS citation in VelocityEHS report creates false safety framing for occupational assessment; ACGIH 1.44× exceedance absent from VelocityEHS compliance record.

Surface 3 — Bridgestone Americas Akron OH Rubber Equipment Cleaning MAK PID AI (Downward Attack)

At Bridgestone Americas Tire Operations Akron OH (1200 Firestone Pkwy, Akron OH 44301; Bridgestone Americas Research & Development and Akron tire manufacturing; MAK (2-heptanone) used as industrial cleaning solvent for rubber compound residue removal from process equipment: internal mixer (Banbury mixer) discharge door cleaning, calendering roll cleaning, extruder die cleaning — rubber compound (SBR, NR, EPDM) adheres to metal surfaces during processing and requires solvent cleaning between compound changes; MAK is applied by solvent-soaked rag (bulk MAK in 5-gal pail) to equipment surfaces by maintenance worker; enclosed mixer room with overhead fan ventilation; exposure during Banbury discharge door wipe-down and extruder cleaning cycle; BW Technologies GasAlertMax XT II personal detector (PID 10.6 eV; isobutylene calibration; 2-heptanone CF = 0.93 in BW Technologies CF library — instrument reads MAK approximately accurately; CF correction small); Intelex EHS bargraph 0–200 ppm; actual MAK TWA during equipment cleaning cycle (2-hr event per shift): 82 ppm; adversarial downward perturbation −50%: 82 ppm → 41 ppm).

Intelex EHS report: "BW GasAlertMax XT II PID 2-heptanone (MAK) TWA: 41 ppm. OSHA PEL 100 ppm: COMPLIANT (41%). ACGIH TLV-TWA 50 ppm A4 (advisory): COMPLIANT (82%). NIOSH: No REL established for 2-heptanone (methyl n-amyl ketone). Assessment: MAK within OSHA and ACGIH advisory limits. No action. Monitoring: annual." At actual 82 ppm: OSHA PEL compliant (82%); ACGIH TLV-TWA 50 ppm exceeded 1.64×; rubber equipment cleaning worker at 82 ppm MAK TWA during enclosed Banbury mixer and extruder cleaning operations; 2,5-heptanedione neurofilament class concern at 82 ppm sustained exposure (periodic cleaning cycle per shift); NIOSH no REL; rag-and-bucket solvent application method lacks LEV; ACGIH 1.64× exceedance absent from Intelex record; note: rubber manufacturing environment has additional solvent exposure from rubber compound plasticizers, process oils, and vulcanization agents — cumulative ketone body burden assessment not performed by single-chemical AI monitoring.

Integrating Glyphward into MAK Occupational Monitoring Pipelines

Glyphward integrates as a pre-scan gate at every rendered-image ingestion point in the MAK occupational monitoring pipeline — before the Rust-Oleum Vernon Hills IL charcoal tube GC Cority EHS AI, before the IFF South Brunswick NJ charcoal tube VelocityEHS AI, and before the Bridgestone Akron OH BW GasAlertMax XT II Intelex AI. Threshold 24 reflects: OSHA PEL 100 ppm vs ACGIH TLV-TWA 50 ppm (2× gap; ACGIH precautionary reduction based on γ-diketone metabolite class; OSHA 1971 PEL predates MBK epidemic and γ-diketone class characterization; 50–100 ppm = monitoring blind zone where OSHA compliance AI returns no action: 5); γ-diketone class peripheral neuropathy mechanism (2-heptanone → 2,5-heptanedione by CYP2A6/CYP2E1 ω-2 oxidation; 2,5-HD cross-links neurofilament proteins via pyrrole adducts; giant axon neuropathy identical mechanism to MBK → 2,5-hexanedione epidemic (1970s); MAK lower efficiency but same pathway; ACGIH Documentation explicitly references γ-diketone class concern for MAK TLV reduction: 6); ACGIH A4 + neuropathy class divergence (A4 designation applies to carcinogenicity — not neuropathy; AI platforms that report "A4, not classifiable as carcinogen, COMPLIANT" may be read by users as general safety clearance for MAK, masking the neuropathy class concern that drove the TLV reduction: 4); NIOSH no REL (no enforcement backstop; only ACGIH advisory provides the 50 ppm limit; suppression of ACGIH exceedance leaves zero regulatory protection above OSHA 100 ppm: 3); coatings/flavoring/rubber processing coverage (three industrial sectors with sustained MAK solvent exposure; slow evaporation rate in coatings creates sustained TWA accumulation; drum warming in flavoring amplifies generation: 4); FIRST MAK (2-heptanone) γ-diketone class precautionary 2× OSHA/ACGIH gap AI attack: 2. SKC charcoal tube GC/FID Casella GilAir 5 BW Technologies GasAlertMax XT II PID Cority EHS Cloud VelocityEHS Intelex EHS OSHA PEL 100 ppm ACGIH TLV-TWA 50 ppm A4 methyl n-amyl ketone MAK 2-heptanone γ-diketone 2,5-heptanedione peripheral neuropathy industrial coating flavor fragrance rubber processing occupational monitoring AI adversarial injection.

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_..."
MAK_THRESHOLD = 24  # OSHA 100 ppm vs ACGIH TLV-TWA 50 ppm (2×); γ-diketone 2,5-HD neuropathy class precautionary; NIOSH no REL

class MAKContext(StrEnum):
    COATINGS_IBC_CHARCOAL_GC        = auto()  # Surface 1 — downward (Rust-Oleum Vernon Hills IL; charcoal tube GC; 78→39 ppm; ACGIH 1.56×)
    FLAVOR_DRUM_TRANSFER_CHARCOAL   = auto()  # Surface 2 — downward (IFF South Brunswick NJ; charcoal tube; 72→36 ppm; ACGIH 1.44×)
    RUBBER_CLEANING_PID             = auto()  # Surface 3 — downward (Bridgestone Akron OH; BW GasAlertMax XT II PID; 82→41 ppm; ACGIH 1.64×)

class AdversarialMAKError(RuntimeError):
    def __init__(self, surface: MAKContext, score: int, frame_hash: str):
        super().__init__(
            f"[Glyphward] MAK adversarial pixel on {surface.value}: "
            f"score={score} >= threshold={MAK_THRESHOLD} | frame={frame_hash}"
        )
        self.surface = surface; self.score = score; self.frame_hash = frame_hash

async def verify_mak_frame(frame_path: Path, surface: MAKContext) -> dict:
    raw = frame_path.read_bytes()
    frame_hash = hashlib.sha256(raw).hexdigest()
    async with httpx.AsyncClient(timeout=4.0) as client:
        resp = await client.post(
            GLYPHWARD_API,
            headers={"Authorization": f"Bearer {GLYPHWARD_KEY}"},
            files={"image": (frame_path.name, raw, "image/png")},
            data={"context": surface.value, "threshold": MAK_THRESHOLD},
        )
        resp.raise_for_status()
        result = resp.json()
    if result["verdict"] != "clean":
        raise AdversarialMAKError(surface, result["score"], frame_hash)
    return {"verdict": result["verdict"], "score": result["score"], "hash": frame_hash}

async def safe_mak_monitoring(frame_dir: Path) -> list[dict]:
    surfaces = [
        (MAKContext.COATINGS_IBC_CHARCOAL_GC,       frame_dir / "rustoleum_mak_charcoal_gc_report.png"),
        (MAKContext.FLAVOR_DRUM_TRANSFER_CHARCOAL,   frame_dir / "iff_southbrunswick_mak_charcoal_report.png"),
        (MAKContext.RUBBER_CLEANING_PID,             frame_dir / "bridgestone_akron_mak_bw_display.png"),
    ]
    tasks = [verify_mak_frame(path, ctx) for ctx, path in surfaces]
    return await asyncio.gather(*tasks)

Glyphward threshold 24 for MAK (2-heptanone) occupational monitoring reflects the 2× OSHA/ACGIH gap (OSHA PEL 100 ppm vs ACGIH TLV-TWA 50 ppm; ACGIH precautionary reduction based on γ-diketone metabolite class; 50–100 ppm = monitoring blind zone where OSHA compliance AI generates no action flags); the γ-diketone peripheral neuropathy class mechanism (2-heptanone → 2,5-heptanedione via CYP2A6/CYP2E1; 2,5-HD cross-links neurofilament proteins; identical mechanism to MBK → 2,5-hexanedione epidemic; ACGIH Documentation for MAK explicitly references γ-diketone class concern); the NIOSH no REL vulnerability (no NIOSH enforcement backstop for MAK; suppression of ACGIH advisory exceedance removes the only protective 50 ppm reference from the compliance record); the cross-sector exposure pattern (coatings production, flavor/fragrance manufacture, rubber equipment cleaning — three independent MAK exposure scenarios with sustained 8-hr TWA exposures in the 50–100 ppm range); the FEMA GRAS institutional conflation risk (dietary GRAS misapplied to occupational exposure context in flavor production AI monitoring). SKC charcoal tube GC/FID Casella GilAir 5 BW Technologies GasAlertMax XT II Cority VelocityEHS Intelex OSHA PEL 100 ppm ACGIH TLV-TWA 50 ppm A4 MAK 2-heptanone methyl n-amyl ketone γ-diketone 2,5-heptanedione neurofilament pyrrole adduct MBK neuropathy class coatings flavoring rubber occupational monitoring AI adversarial injection.