A grayish-yellow to grayish-red, crystalline solid.
Manufacture of dyes, as reagent for hydrogen peroxide in milk.
Registry Numbers and Inventories.
EC Index Number
Carcinogenic Category 1; Harmful; Dangerous for the Environment
Tumorigen; Mutagen; Human Data
Swiss Giftliste 1
Melting point, °C
126 - 127
Boiling point, °C
Vapor pressure, mmHg
2.5E-5 (25 C)
Vapor density (air=1)
Solubility in water
Partition coefficient, pKow
Heat of fusion
Heat of vaporization
Heat of combustion
Hazards and Protection.
For cargo ships or passenger ships which are carrying not more than 25 passengers or 1 per 3 m of length, store on deck or under deck.
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Wear appropriate protective gloves, clothing and goggles.
Wear positive pressure self-contained breathing apparatus (SCBA).
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers.
Darkens on exposure to air and light.
Incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides.
Dangerous when heated to decomposition, emits highly toxic fumes of nitrogen oxides.
Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Use water in flooding quantities as fog. Use foam, dry chemical, or carbon dioxide.
When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards.
Contain highly toxic NOx fumes.
TLV: ppm; mg/m3 A1 (confirmed human carcinogen) (ACGIH 1994-1995). OSHA PEL: 1910.1010 See Appendix B See Appendix C NIOSH REL: Ca See Appendix A See Appendix C NIOSH IDLH: Potential occupational carcinogen
O, G-A1, I-1, N-1, CP65
CNS effects include headache, dizziness, altered mental status, confusion (lethargy progressing coma), seizures, syncope; occur secondary to CNS hypoxia, usually with levels > 20%.
Nausea and vomiting may occur.
Dyspnea and tachypnea may occur.
Central cyanosis unresponsive to oxygen therapy is classic.
DO NOT INDUCE VOMITING. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. Be prepared to transport the victim to a hospital if advised by a physician. If the victim is convulsing or unconscious, do not give anything by mouth, ensure that the victim's airway is open and lay the victim on his/her side with the head lower than the body. DO NOT INDUCE VOMITING. IMMEDIATELY transport the victim to a hospital.
IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. IMMEDIATELY call a physician and be prepared to transport the victim to a hospital even if no symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used.
IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. IMMEDIATELY call a hospital or poison control center even if no symptoms (such as redness or irritation) develop. IMMEDIATELY transport the victim to a hospital for treatment after washing the affected areas.
First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.
USCG CHRIS Code
Std. Transport #