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PHENYLHYDRAZINEICSC: 0938
Hydrazinobenzene
Monophenylhydrazine
April 2005
CAS #: 100-63-0
UN #: 2572
EC Number: 202-873-5

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible. Gives off irritating or toxic fumes (or gases) in a fire.  Above 88°C explosive vapour/air mixtures may be formed.  NO open flames.  Above 88°C use a closed system and ventilation.  Use water spray, alcohol-resistant foam, powder, carbon dioxide.  In case of fire: keep drums, etc., cool by spraying with water. 

 AVOID ALL CONTACT!  
  SYMPTOMS PREVENTION FIRST AID
Inhalation Cough. Sore throat. Weakness. Dizziness.  Use local exhaust or breathing protection.  Fresh air, rest. Refer for medical attention. 
Skin MAY BE ABSORBED! Dry skin. Redness. Pain.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention . 
Eyes Redness. Pain. Blurred vision.  Wear face shield or eye protection in combination with breathing protection.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Abdominal pain. Diarrhoea. Dizziness. Nausea. Vomiting. Weakness.  Do not eat, drink, or smoke during work.  Rinse mouth. Give a slurry of activated charcoal in water to drink. Refer for medical attention . 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Evacuate danger area! Personal protection: complete protective clothing including self-contained breathing apparatus. Do NOT let this chemical enter the environment. If liquid: collect leaking liquid in sealable containers. Absorb remaining liquid in sand or inert absorbent. If solid: sweep spilled substance into containers. Carefully collect remainder. Then store and dispose of according to local regulations. 

According to UN GHS Criteria

 

Transportation
UN Classification
UN Hazard Class: 6.1; UN Pack Group: II 

STORAGE
Separated from strong oxidants and food and feedstuffs. Store in an area without drain or sewer access. 
PACKAGING
Do not transport with food and feedstuffs. 
PHENYLHYDRAZINE ICSC: 0938
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS-TO-YELLOW OILY LIQUID OR CRYSTALS. TURNS RED-BROWN ON EXPOSURE TO AIR AND LIGHT. 

Physical dangers
 

Chemical dangers
Decomposes on burning. This produces toxic fumes including nitrogen oxides. Reacts with strong oxidants. Reacts violently with lead dioxide. 

Formula: C6H8N2 / C6H5NHNH2
Molecular mass: 108.1
Decomposes at 243.5°C
Melting point: 19.5°C
Relative density (water = 1): 1.1
Solubility in water, g/100ml at 25°C: 14.5
Vapour pressure, Pa at 20°C: 10
Relative vapour density (air = 1): 3.7
Flash point: 88°C c.c.
Auto-ignition temperature: 174°C
Explosive limits, vol% in air: 1.1-?
Octanol/water partition coefficient as log Pow: 1.25  


EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation of its aerosol, through the skin and by ingestion. 

Effects of short-term exposure
The substance is irritating to the eyes, skin and respiratory tract. The substance may cause effects on the blood. This may result in haemolysis. The effects may be delayed. Medical observation is indicated. 

Inhalation risk
A harmful contamination of the air can be reached rather quickly on evaporation of this substance at 20°C. 

Effects of long-term or repeated exposure
Repeated or prolonged contact may cause skin sensitization. The substance may have effects on the blood. This may result in anaemia. This substance is possibly carcinogenic to humans. 


OCCUPATIONAL EXPOSURE LIMITS
TLV: 0.1 ppm as TWA; (skin); A3 (confirmed animal carcinogen with unknown relevance to humans).
MAK: skin absorption (H); sensitization of skin (SH); carcinogen category: 3B 

ENVIRONMENT
The substance is toxic to aquatic organisms. 

NOTES
The symptoms of hemolysis do not become manifest until hours have passed.
Do NOT take working clothes home. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: T, N; R: 45-23/24/25-36/38-43-48/23/24/25-68-50; S: 53-45-61; Note: E 

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    See Also:
       Toxicological Abbreviations
       Phenylhydrazine (CICADS 19, 2000)