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1,2-DIPHENYLHYDRAZINE ICSC: 0263
Date of Peer Review: April 2005

Hydrazobenzene
Diphenylhydrazine
N,N'-Bianiline
CAS # 122-66-7 C12H12N2 / C6H5NHNHC6H5
RTECS # MW2625000 Molecular mass: 184.3
UN #
EC # 007-021-00-4
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Combustible. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames.
Powder, water spray, foam, carbon dioxide.
EXPLOSION


EXPOSURE See EFFECTS OF LONG-TERM OR REPEATED EXPOSURE.
AVOID ALL CONTACT!

Inhalation Cough.
Local exhaust or breathing protection.
Fresh air, rest.
Skin
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse and then wash skin with water and soap.
Eyes Redness.
Safety spectacles or eye protection in combination with breathing protection.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Personal protection: P3 filter respirator for toxic particles. Sweep spilled substance into sealable containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place. Do NOT let this chemical enter the environment.
Do not transport with food and feedstuffs.
EU Classification
Symbol: T, N
R: 45-22-50/53
S: 53-45-60-61
Note: [E]
UN Classification

EMERGENCY RESPONSE STORAGE

Separated from food and feedstuffs. Store in an area without drain or sewer access.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 1999

SEE IMPORTANT INFORMATION ON BACK
1,2-DIPHENYLHYDRAZINE ICSC: 0263
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
WHITE TO YELLOW CRYSTALS

CHEMICAL DANGERS:
The substance decomposes on burning producing toxic fumes including nitrogen oxides. Reacts with mineral acids to produce benzidine (see ICSC 0224).

OCCUPATIONAL EXPOSURE LIMITS:
TLV not established. MAK: Carcinogen category: 2; (DFG 2004).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation and by ingestion.

INHALATION RISK:
A harmful concentration of airborne particles can be reached quickly when dispersed.

EFFECTS OF SHORT-TERM EXPOSURE:
May cause mechanical irritation.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
This substance is probably carcinogenic to humans.
PHYSICAL PROPERTIES
Melting point (decomposes): 125-131C
Density: 1.16 g/cm
Solubility in water, g/100 ml at 20C: <0.1 (poor)
Octanol/water partition coefficient as log Pow: 2.94
ENVIRONMENTAL DATA
The substance is very toxic to aquatic organisms. Bioaccumulation of this chemical may occur in fish.
NOTES
Do NOT take working clothes home. Depending on the degree of exposure, periodic medical examination is suggested.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 1999