Hydrogen cyanide

Identification

Substance: Hydrogen cyanide

CAS RN: 74-90-8

Shipping Name/Number:
    UN 1051; Hydrogen cyanide, stabilized with less than 3% water
    UN 1613; Hydrocyanic acid, aqueous solutions or hydrogen cyanide, aqueous solutions with not more than 20% hydrogen cyanide
    UN 1614; Hydrogen cyanide, stabilized, with less than 3% water and absorbed in a porous inert material
    UN 3294; Hydrogen cyanide, solution in alcohol with not more than 45% hydrogen cyanide

STCC:
    49 214 17; Hydrocyanic acid solution, less than 5% hydrocyanic acid.
    49 201 25; Hydrocyanic acid, liquefied
    49 201 30; Hydrocyanic acid, solution (5% or more hydrocyanic acid)

State:
    liquid
    gas
Color:
    colorless
    bluish
    whitish
Clarity:
    clear
Odor:
    almond-like odor
    fruity/floral/sweet
Taste:
    bitter taste
    other taste
    burning taste
pH:
    acid (0-6)
     weak acid (6)
Specific Gravity:
    floats in water (< 1)
Vapor Density:
    rises in air (< 1)

Neurological:
    agitation
    lowered mental state
    unresponsive
    fatigue/weakness
    dizziness
    headache
    spasms/seizures
    paralysis
Eyes:
    dilated pupils
    eye irritation/redness
    eye swelling
Nose:
    nasal irritation
Mouth/Throat:
    mouth irritation
    throat irritation
Cardiovascular:
    arrhythmia
    bradycardia
    tachycardia
    hypertension
    hypotension/shock
    hypoxia/cyanosis
Respiratory:
    irregular breathing
    slow breathing
    rapid breathing
    shortness of breath
    respiratory arrest
    resp burning/irritation
    pulmonary edema
    hypoxia/cyanosis
Gastro/Urinary:
    abdom. discomfort
    nausea
    vomiting
Skin:
    cyanosis/blue

NFPA704-Health:
    4 - Extreme
NFPA704-Flammability:
    4 - Extreme
NFPA704-Instability:
    1 - Slight
NFPA704-Special Hazards:
    Not Applicable

Miscellaneous Categories:
    Not Applicable
DOT Hazard Classifications:
    Class 3 - Flammable liquids (and Combustible liquids [U.S.])
    Class 6 - Toxic substances and Infectious substances
    Division 6.1 - Toxic substances
WMDs:
    Blood Agents

Placard:
    Dangerous - Mixed load/unidentified cargo
    Class 3 - Liquids, flammable/combustible
    Class 3 - Fuel oil, gasoline and hot/elevated temperature
    Division 6.1 - Toxic/Poisonous substances
Rail Car:
    Pressure tank car
    Non-pressure/low pressure tank car
    Box car
Road Trailer:
    MC331, TC331, SCT331
    MC338, TC338, SCT338, TC341, CGA341
    DOT406, TC406, SCT306, MC306, TC306
    Compressed Gas/Tube Trailer
    Mixed Cargo
    Intermodal Freight Container
    Intermodal Tank

Find more information on this substance at: PubChem, PubMed