White to light purple solid.
Dyeing furs, also in photochemical measurements, accelerating vulcanization, Manufacture azo dyes.
Registry Numbers and Inventories.
EC Index Number
Toxic; Irritant; Sensitising; Dangerous for the Environment
R 23/24/25 36 43 50/53
S 28 36/37 45 60 61
Agricultural Chemical and Pesticide; Tumorigen; Mutagen; Human Data; Primary Irritant
Swiss Giftliste 1
Japan ENCS (MITI)
Melting point, °C
139 - 141
Boiling point, °C
Vapor pressure, mmHg
0.008 (25 C)
Vapor density (air=1)
Less than 1300 ppm (0.1%) at 20 C (calculated)
Solubility in water
Partition coefficient, pKow
Heat of fusion
Heat of vaporization
Heat of combustion
Hazards and Protection.
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Material darkens on exposure to air.
Wash thoroughly after handling. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with skin and eyes. Avoid contact with heat, sparks and flame. Do not ingest or inhale.
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Vacuum or sweep up material and place into a suitable disposal container. Avoid generating dusty conditions. Remove all sources of ignition.
Stable under normal temperatures and pressures. Substance undergoes color change upon exposure to light and air.
Strong oxidizing agents.
Nitrogen oxides, carbon monoxide, carbon dioxide.
Upper exp. limit, %
Lower exp. limit, %
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical foam.
Combustible when exposed to heat or flame.
When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards.
Fire may produce irritating, corrosive and/or toxic gases.
TLV: 0.1 mg/m3 A4 (as TWA) (ACGIH 1997). MAK: 0.1 mg/m3; H, S, IIIB (1996) OSHA PEL: TWA 0.1 mg/m3 skin NIOSH REL: TWA 0.1 mg/m3 skin NIOSH IDLH: 25 mg/m3
Prolonged or repeated skin contact may cause dermatitis. Prolonged or repeated exposure may cause adverse reproductive effects.
Harmful if swallowed. May cause irritation of the digestive tract. May cause liver and kidney damage. Ingestion may cause gastritis, vertigo, tremors, convulsions, and possible coma.
Dust is irritating to the respiratory tract. May cause asthmatic attacks due to allergic sensitization of the respiratory tract. May cause rhinitis.
Causes skin irritation. May be absorbed through the skin in harmful amounts. May cause skin sensitization, an allergic reaction, which becomes evident upon re-exposure to this material. May produce eczematoid contact dermatitis
Causes eye irritation. May cause conjunctivitis and keratitis.
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists.
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.
USCG CHRIS Code
2921 51 19
Std. Transport #