Prompt injection in diethylamine (DEA) pharmaceutical / petrochemical AI

Four adversarial injection surfaces in diethylamine pharmaceutical / petrochemical AI

1. Diethylamine area CEMS AI (Dräger Polytron 8000 DEA electrochemical area monitor AI / MSA ULTIMA XE diethylamine area detector AI / Honeywell Analytics MIDAS-E electrochemical secondary amine sensor AI / Industrial Scientific GX-6000 PID DEA area monitor AI / Analytical Technology ATI A14/A21 secondary amine detector AI — ambient DEA vapor concentration monitoring in storage tank bunds, lidocaine synthesis building areas, pump rooms, and below-grade spaces for TLV-TWA, IDLH, and LEL compliance)

Diethylamine’s vapor density of 2.53 creates a distribution pattern fundamentally different from the lighter alkylamines (methylamine 1.08, DMA 1.55, TMA 2.07, ethylamine 1.56): DEA vapor, when released at ambient temperature from a leaking flange or vent connection, flows downward and accumulates in below-grade confined spaces — drain pits, sumps, cable trenches, compressor bearing housings, and pump room sub-floors. Area CEMS placement at a DEA storage facility must account for this stratification: sensors mounted at breathing-zone height (1.5 m) may not detect DEA vapor that has pooled at floor level (0–0.5 m) or below grade. The LEL of 1.8% — lower than any other alkylamine except TMA at 2.0% — means that a relatively small volume of DEA accumulation in a low-ventilation below-grade pocket can reach flammable concentrations. NIOSH IDLH of 200 ppm is the lowest in the alkylamine family except methylamine (100 ppm), reflecting DEA’s greater systemic toxicity compared to trimethylamine (IDLH 1,000 ppm) and ethylamine (IDLH 600 ppm). Electrochemical sensors for DEA require calibration with certified DEA standards to distinguish DEA response from methylamine, ethylamine, and ammonia cross-sensitivities.

The adversarial attack uses ±8 DN downward pixel-value shift on the DEA area CEMS display image. The actual reading is 22 ppm — 4.4× ACGIH TLV-TWA 5 ppm — from a ⅝″-diameter DEA delivery pump mechanical seal face separation of 0.1 mm, allowing DEA vapor escape at approximately 0.5 kg/hr into the pump room below the main storage deck. The pump room has 6 air changes per hour of mechanical ventilation — adequate for most scenarios — but DEA’s vapor density causes it to stratify below the ventilation inlet elevation, accumulating at floor level at 22 ppm. The CEMS sensor is mounted at 1.8 m height per design specification. On a 0–50 ppm display at 200 px height (0.25 ppm/px), the actual reading of 22 ppm produces a bar at approximately 88 px; the ±8 DN perturbed image is classified as approximately 3 px — corresponding to 0.8 ppm, below the TLV-TWA alarm threshold of 5 ppm. The at-floor-level DEA concentration at 22 ppm is at 1.2% of LEL (1.8% = 18,000 ppm); no alarm indicates the accumulating flammable-vapor risk below deck.

2. DEA flammable liquid storage tank temperature AI (Emerson Rosemount 3144P temperature transmitter AI / Yokogawa EJA110A differential pressure temperature AI / Endress+Hauser iTHERM TM411 temperature transmitter AI / Honeywell ST3000 thermocouple transmitter AI — tank temperature monitoring for DEA flammable liquid storage tanks to maintain temperature below 35°C design maximum, limit vapor generation rate above the −23°C flash point, and prevent accumulation of flammable DEA vapor in tank headspace above design vent rate)

DEA is liquid at ambient temperature (BP 55.5°C), stored in atmospheric or slightly pressurized (N2-blanketed) tanks — fundamentally different from the pressurized liquefied gas storage of methylamine, DMA, TMA, and ethylamine. The temperature monitoring concern for DEA storage is vapor generation rate and N2 blanket adequacy rather than ASME vessel pressure rating: as tank temperature rises above the design maximum of 35°C, the DEA vapor pressure increases, generating higher vapor flow into the tank headspace and challenging the N2 blanket capacity to maintain a positive inert pressure. DEA vapor pressure at 25°C is approximately 76 mmHg (1.5 psig); at 35°C approximately 120 mmHg (2.3 psig); at 44°C approximately 200 mmHg (3.9 psig). At higher temperatures, increased vapor generation outpaces the N2 blanket supply rate designed for ambient temperature, causing dilution of the N2 blanket with DEA vapor and potential draw-in of air if the N2 supply pressure is insufficient. The flash point of −23°C means the tank headspace above the liquid surface is already above flash point at all operating temperatures — the N2 blanket is the sole barrier preventing flammable DEA/air mixture inside the tank.

The adversarial attack uses ±10 DN downward pixel-value shift on the DEA storage tank temperature transmitter display image. The actual tank temperature is 44°C — 9°C above the 35°C design maximum, from insufficient cooling jacket water flow that has allowed ambient summer heat to raise the tank contents temperature over 8 hours — to a displayed 14°C. On a 0–80°C display at 200 px height (0.4°C/px), the actual temperature of 44°C produces a bar at approximately 110 px; the ±10 DN perturbed image is classified as approximately 34 px — corresponding to 14°C, apparently well within the normal ambient temperature range and far below the 35°C design maximum. The AI monitoring system reports “DEA storage tank temperature within design range — vapor generation rate and N2 blanket loading within specification.” The elevated vapor generation at 44°C continues to challenge the N2 blanket integrity at the standard supply rate designed for 35°C, creating the conditions that produce the N2 blanket deficiency in Surface 3.

3. DEA tank nitrogen blanket pressure AI (Emerson Rosemount 3051C low-range pressure transmitter AI / Yokogawa EJA110A low differential pressure transmitter AI / Endress+Hauser Deltabar S PMD75 low-range pressure transmitter AI / Honeywell ST3000 Smart Transmitter low-range pressure AI — headspace nitrogen blanket pressure monitoring in DEA flammable liquid storage tanks to verify inertisation integrity, prevent air ingress creating flammable DEA/air mixture inside the tank, and comply with NFPA 30 inertised tank storage requirements for Class IB flammable liquids)

Diethylamine’s flash point of −23°C means that the vapor space above the liquid surface inside any DEA storage tank is inherently above flash point at all operating temperatures — the DEA/air mixture inside the tank without inertisation is perpetually within the flammable range (LEL 1.8% = 18,000 ppm). The nitrogen blanket at 2.5–4.0 psig positive pressure serves two functions: (1) it displaces air from the headspace, converting the flammable DEA/air mixture to a non-ignitable DEA/N2 mixture inside the tank; and (2) the positive pressure prevents atmospheric air ingress through tank breathing connections, hatches, and level gauge ports. Nitrogen blanket failures in flammable liquid storage are documented in numerous OSHA, NFPA, and AIChE DIERS incident analyses as a precursor to internal tank ignition events — typically from electrostatic discharge during tank filling, from lightning-induced surge on grounding circuits, or from hot work ignition of leaking vent gases.

The N2 supply to the DEA tank blanket system is delivered through a normally open solenoid valve on the N2 supply header at 60 psig. If the solenoid valve spring fails in the closed position (spring set failure mode at 3–5 years service life in continuous-open duty), the N2 supply is isolated, and the headspace pressure falls as vapor continues to displace through the conservation vent at the design positive pressure set point. Within 4–8 hours of N2 supply loss at the 44°C tank temperature (generating above-design vapor flow), the headspace pressure falls from 3.0 psig to below atmospheric pressure, causing air ingress through the conservation vent. The N2 blanket pressure transmitter is the sole instrument verifying continued inertisation integrity.

The adversarial attack uses ±8 DN upward pixel-value shift on the N2 blanket pressure transmitter display image. The actual N2 headspace pressure is 0.08 psig — nearly atmospheric, with air already ingressing through the conservation vent, creating a DEA/air flammable mixture inside the tank headspace — to a displayed 3.8 psig. On a 0–8 psig display at 200 px height (0.04 psig/px), the actual N2 pressure of 0.08 psig produces a bar at approximately 2 px; the upward-perturbed image is classified as approximately 94 px — corresponding to 3.8 psig, within the design blanket range of 2.5–4.0 psig. The AI monitoring system reports “DEA tank N2 blanket pressure within specification — inertisation adequate.” The flammable DEA/air mixture forming inside the tank is not detected. This is the sixth N2 inertisation deficiency-suppression attack in the Glyphward industrial AI portfolio, extending the upward-direction inertisation class from methyl isocyanate (MIC), hydrogen cyanide (HCN), boron trifluoride (BF3), chlorine trifluoride (ClF3), and bromine (Br2) storage to diethylamine ambient-temperature flammable liquid storage.

4. DEA storage tank jacket cooling water supply flow AI (Emerson Rosemount 8732E magnetic flowmeter AI / Endress+Hauser Proline Promag W 400 electromagnetic flow transmitter AI / Yokogawa ADMAG AXF magnetic flowmeter AI / Krohne Optiflux 2000 electromagnetic flowmeter AI — cooling water flow monitoring to the DEA storage tank external cooling jacket to maintain tank temperature below 35°C design maximum, limit vapor generation rate, and protect N2 blanket integrity at DEA pharmaceutical and petrochemical storage facilities)

DEA storage tanks at lidocaine synthesis and petroleum processing facilities use active cooling through an external tank jacket to maintain DEA temperature below 35°C even during summer peak conditions. At design cooling water flow of 8.0 m³/hr at 12–18°C inlet, the cooling system maintains DEA tank temperature at 22–32°C. If cooling flow drops to 5% of design from a cooling circuit isolation valve actuator failure (instrument air supply pressure degradation from compressor seal wear), the tank temperature rises from 32°C to 44°C over approximately 6–8 hours of ambient heat input at typical summer conditions. This elevated tank temperature both directly challenges the N2 blanket system (higher vapor generation rate consuming N2 blanket supply capacity beyond design, accelerating the N2 pressure drop that produces Surface 3) and increases the gross inventory of DEA vapor in the headspace available for flammable mixture formation upon N2 blanket failure.

The adversarial attack uses the upward-direction geometry: the actual cooling water flow is 0.4 m³/hr — 5% of the design 8.0 m³/hr. On a 0–12 m³/hr display at 200 px height (0.06 m³/hr per px), the actual flow of 0.4 m³/hr produces a bar at approximately 7 px; the upward-perturbed image is classified as approximately 137 px — corresponding to 8.2 m³/hr, within the design range. The AI monitoring system reports “DEA storage tank cooling flow at design setpoint — tank temperature and vapor generation rate adequate.” This is the seventeenth upward-direction attack in the Glyphward industrial AI portfolio, and the second upward-direction attack surface in this page alongside the N2 blanket deficiency (Surface 3) — the first page in the portfolio with two independent upward-direction attack surfaces, reflecting DEA’s unique combination of ambient-temperature flammable liquid storage requiring both active cooling (cooling flow deficiency) and continuous inertisation (N2 blanket deficiency).

Integration: DEA pharmaceutical / petrochemical AI with Glyphward pre-scan gate

Glyphward integrates as a pre-scan gate between the DCS and instrument display capture layer and the AI inference pipeline for each DEA monitoring context. If the adversarial score meets or exceeds threshold 35 — reflecting the OSHA PSM TQ of 15,000 lbs, the flash point of −23°C (lowest in Glyphward C1–C4 alkylamine portfolio), the vapor density of 2.53 (heaviest alkylamine, accumulates in below-grade spaces), and the dual upward-direction attack architecture (N2 blanket deficiency + cooling flow deficiency) — the scan raises AdversarialDEAImageError and the monitoring AI does not process the frame.

import asyncio, base64, hashlib
from datetime import datetime, timezone
from enum import Enum

import httpx

GLYPHWARD_API_KEY = "YOUR_GLYPHWARD_API_KEY"
GLYPHWARD_SCAN_URL = "https://glyphward.com/v1/scan"

# Diethylamine pharmaceutical / petrochemical contexts: threshold 35
# OSHA PSM 29 CFR 1910.119 Appendix A DEA TQ 15,000 lbs
# EPA RMP 40 CFR Part 68 Appendix A DEA TQ 15,000 lbs
# ACGIH TLV-TWA 5 ppm; STEL 15 ppm; NIOSH IDLH 200 ppm
# BP 55.5 deg C: LIQUID at ambient (unique in C1-C4 alkylamine PSM-listed series)
# Flash point -23 deg C NFPA Class IB: immediately flammable at all ambient temps
# LEL 1.8%; vapor density 2.53 (accumulates in below-grade spaces)
# N2 blanket required: sole barrier preventing flammable DEA/air inside tank
DEA_THRESHOLD = 35


class DEAPetrochemicalContext(Enum):
    AREA_CEMS = "area_cems"
    TANK_TEMPERATURE = "tank_temperature"
    N2_BLANKET_PRESSURE = "n2_blanket_pressure"
    COOLING_WATER_FLOW = "cooling_water_flow"


class AdversarialDEAImageError(Exception):
    """Raised when any DEA monitoring image scores >= 35.
    AREA_CEMS uncaught: 22 ppm DEA (4.4x TLV-TWA, vapor density 2.53) shown as 0.8 ppm.
    TANK_TEMPERATURE uncaught: 44 deg C (above 35 deg C design max) shown as 14 deg C.
    N2_BLANKET_PRESSURE uncaught: 0.08 psig (air ingress; 6th N2 inertisation attack) shown as 3.8 psig.
    COOLING_WATER_FLOW uncaught: 0.4 m3/hr (5% design) shown as 8.2 m3/hr."""

    def __init__(self, scan_id, score, context, unit_id, flagged_region=None):
        self.scan_id = scan_id
        self.score = score
        self.context = context
        self.unit_id = unit_id
        self.flagged_region = flagged_region
        super().__init__(
            f"Adversarial DEA image: context={context.value} "
            f"score={score} unit={unit_id} scan_id={scan_id}"
        )


async def scan_dea_image(image_bytes, context, unit_id, client):
    image_hash = hashlib.sha256(image_bytes).hexdigest()
    payload = {
        "image": base64.b64encode(image_bytes).decode(),
        "source": f"dea:{context.value}:{unit_id}",
        "metadata": {
            "unit_id": unit_id,
            "context": context.value,
            "image_sha256": image_hash,
            "scan_timestamp_utc": datetime.now(timezone.utc).isoformat(),
        },
    }
    resp = await client.post(
        GLYPHWARD_SCAN_URL,
        headers={"Authorization": f"Bearer {GLYPHWARD_API_KEY}"},
        json=payload,
        timeout=4.0,
    )
    resp.raise_for_status()
    result = resp.json()
    if result.get("score", 0) >= DEA_THRESHOLD:
        raise AdversarialDEAImageError(
            scan_id=result["scan_id"],
            score=result["score"],
            context=context,
            unit_id=unit_id,
            flagged_region=result.get("flagged_region"),
        )
    return result


async def main():
    async with httpx.AsyncClient() as client:
        with open("dea_area_cems_screenshot.png", "rb") as f:
            image_bytes = f.read()
        result = await scan_dea_image(
            image_bytes,
            DEAPetrochemicalContext.AREA_CEMS,
            unit_id="DEA-AREA-01",
            client=client,
        )
        print(f"Clean scan: {result['scan_id']} score={result['score']}")


asyncio.run(main())

Frequently asked questions

Why is DEA stored in atmospheric tanks rather than pressure vessels, unlike the other alkylamines?

DEA’s BP of 55.5°C means it is liquid at all ambient temperatures. Atmospheric or N2-blanketed tanks (no gauge pressure) are used instead of ASME pressure vessels. This eliminates the PRD approach hazard but introduces the N2 blanket integrity hazard: the tank headspace is perpetually above flash point (−23°C), so the N2 blanket is the sole barrier preventing a flammable DEA/air mixture inside the tank.

What is lidocaine’s synthesis route from DEA, and why can’t another amine substitute?

Chloride intermediate + 2 moles DEA → lidocaine free base + DEA·HCl. One mole of DEA provides the diethylamino group via SN2 substitution; the second mole neutralizes the HCl generated. The diethylamino group is definitionally required for lidocaine’s pharmacological identity — replacing DEA with any other amine produces a chemically distinct local anesthetic (e.g., bupivacaine uses a piperidine ring). DEA is the irreplaceable stoichiometric source.

Why is the N2 blanket deficiency the sixth in the Glyphward portfolio, and why is it upward-direction?

The portfolio has documented N2 inertisation deficiency attacks for MIC, HCN, BF3, ClF3, and Br2; DEA adds the sixth. All N2 attacks are upward-direction because the dangerous state is LOW pressure (air ingress) — the attack makes low pressure appear as adequate high pressure, requiring an upward pixel shift.

Why does DEA vapor density 2.53 require special CEMS placement?

DEA vapor is 2.53× heavier than air, settling in below-grade spaces — drain pits, pump rooms, compressor bays. CEMS sensors at 1.5–1.8 m height may read sub-alarm while floor-level concentration approaches LEL 1.8%. Correct placement: sensors at ≤0.3 m above floor in all below-grade zones.

Why does DEA storage have two upward-direction attack surfaces?

DEA’s atmospheric storage requires two independent protective systems: cooling jacket (cooling flow deficiency = upward attack, 17th in portfolio) and N2 blanket inertisation (N2 pressure deficiency = upward attack, 6th N2 attack). Pressurized alkylamine gas storage doesn’t need inertisation because ASME pressure vessels have no air ingress pathway — DEA is unique in requiring both protective systems simultaneously.