Carbon Disulfide

A: Classic toxicological profile: Neurotoxicity, vascular toxicity, and reproductive toxicity.

Acute effects: Inhalation of high-concentration vapors causes anesthesia, coma, and respiratory failure; skin contact with the liquid causes chemical burns and necrosis; the lethal oral dose is approximately 10–20 mL.

Chronic effects (most severe): Long-term low-concentration exposure leads to irreversible peripheral neuropathy (numbness in limbs, muscle atrophy, difficulty walking), cerebrovascular damage (increased stroke risk), retinopathy, and psychiatric disorders (neurosis-like symptoms); in males, it can cause reduced sperm count and sexual dysfunction.

LD₅₀ (rat, oral): Approx. 3188 mg/kg (moderately toxic), but inhalation toxicity is extremely high (rat LC₅₀, 4h: approx. 25 mg/m³).

Carcinogenicity: Classified by IARC as Group 2B (possibly carcinogenic to humans); primarily associated with liver cancer and prostate cancer.

Teratogenicity/Mutagenicity: Clearly teratogenic in animal studies; human epidemiological data are limited but highly suggestive of risk.

Occupational exposure limits:

China GBZ 2.1: PC-TWA 5 mg/m³ (≈1.6 ppm), PC-STEL 10 mg/m³ (strictly controlled).

ACGIH TLV-TWA: 1 ppm (3.1 mg/m³, Skin).

NIOSH REL: 1 ppm (TWA), 10 ppm (STEL), IDLH 500 ppm.

A: Baseline requirements include a fully enclosed, explosion-proof, leak-proof, and anti-static setup: operations must be conducted within a negative-pressure, explosion-proof ventilation system, equipped with LEL alarms and 24-hour monitoring.

PPE: Butyl rubber gloves (solely recommended), fully enclosed chemical-resistant suits, self-contained breathing apparatus (SCBA), and goggles plus face shields; bare hands or exposed skin are strictly prohibited. Work uniforms must be laundered separately and are forbidden from being taken out of the workshop.

Storage: Store in a cool (≤25°C), ventilated, dedicated explosion-proof warehouse, away from heat sources, ignition sources, oxidizing agents, and strong alkalis. Storage tanks require nitrogen blanketing, cooling systems, and anti-static grounding; co-storage with food or animal feed is prohibited.

Leak Response: Immediately evacuate personnel and cut off ignition sources; use sand, soil, or vermiculite to absorb the spill. For large leaks, transfer the material to a dedicated collection vessel using an explosion-proof pump; flushing with water is strictly prohibited (as it causes spreading and CS₂ sinks to the bottom). Dispose of via incineration as sulfur-containing organic hazardous waste (with flue gas desulfurization).

Firefighting: Use dry powder, carbon dioxide, or sand/soil; do not use water or foam (these are ineffective and cause splashing). CS₂ can spontaneously ignite at temperatures above 90°C; firefighters must wear SCBA.