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alpha-NAPHTHYLTHIOUREAICSC: 0973
Antu
1-(1-Naphthyl)-2-thiourea
1-Naphtylthiourea
November 2000
CAS #: 86-88-4
UN #: 1651
EC Number: 201-706-3

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible under specific conditions. Gives off irritating or toxic fumes (or gases) in a fire.        Use water spray, powder, foam, carbon dioxide.   

 PREVENT DISPERSION OF DUST! STRICT HYGIENE! IN ALL CASES CONSULT A DOCTOR! 
  SYMPTOMS PREVENTION FIRST AID
Inhalation Cough. Laboured breathing. Shortness of breath.  Use local exhaust or breathing protection.  Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention. 
Skin MAY BE ABSORBED!  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse and then wash skin with water and soap. 
Eyes   Wear safety goggles, 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. Vomiting. Laboured breathing.  Do not eat, drink, or smoke during work. Wash hands before eating.  Give a slurry of activated charcoal in water to drink. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention . 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. 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, silver nitrate and food and feedstuffs. 
PACKAGING
Do not transport with food and feedstuffs. 
alpha-NAPHTHYLTHIOUREA ICSC: 0973
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
WHITE ODOURLESS CRYSTALLINE POWDER. 

Physical dangers
 

Chemical dangers
Decomposes on heating. This produces toxic gases and toxic fumes including nitrogen oxides, sulfur oxides and carbon monoxide. Reacts with strong oxidants such as silver nitrate. This generates fire and explosion hazard. 

Formula: C11H10N2S / C10H7NHCSNH2
Molecular mass: 202.3
Decomposes: see Notes.
Melting point: 198°C
Density: >1 g/cm³
Solubility in water: none
Octanol/water partition coefficient as log Pow: 1.66 (calculated) 


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
Exposure could cause lung oedema. Medical observation is indicated. 

Inhalation risk
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly. 

Effects of long-term or repeated exposure
 


OCCUPATIONAL EXPOSURE LIMITS
TLV: 0.3 mg/m3, as TWA; (skin); A4 (not classifiable as a human carcinogen).
MAK: skin absorption (H); carcinogen category: 3B 

ENVIRONMENT
 

NOTES
Commonly present impurities can change the toxicological properties of this substance; consult an expert.
Technical product is a blue-grey powder.
Temperature of decomposition unknown in literature.
Do NOT take working clothes home. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: T+; R: 28-40; S: (1/2)-25-36/37-45 

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    See Also:
       Toxicological Abbreviations