4-Aminoantipyrene

  • 4-Amino-2,3-dimethyl-1-phenyl-5-pyrazolone
  • 4-Amino-1,5-dimethyl-2-phenyl-3-pyrazolone
  • 1-Phenyl-2,3-dimethyl-4-amino-5-pyrazolone
  • 1,2-Dihydro-1,5-dimethyl-2-phenyl-4-amino-3H-pyrazol-3-one
  • 3H-Pyrazol-3-one, 4-amino-1,2-dihydro-1,5-dimethyl-2-phenyl-
  • Metapirazone
Formula
C11H13N3O
Structure
Description
Odorless, yellow powder.

Registry Numbers and Inventories.
CAS
83-07-8
EC (EINECS/ELINCS)
201-452-3
EC Class
harmful
R 22 36/37/38
S 26 36/37/39
RTECS
CD2480000
RTECS class
Drug; Mutagen
Merck
13,596
Beilstein/Gmelin
181635
Beilstein Reference
5-25-14-00096
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C11H13N3O
Formula mass
203.25
Melting point, °C
107 - 109
Solubility in water
500 g/L
pKa/pKb
9.50 (pKb)

Hazards and Protection.
Storage
Store in a cool, dry place.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Minimize dust generation and accumulation.
Protection
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.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Provide ventilation.
Disposal code
3
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents, strong acids, acid chlorides, acid anhydrides.
Decomposition
Nitrogen oxides, carbon monoxide, carbon dioxide, nitrogen.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam.
Health
1
 
Flammability
0
 
 
Reactivity
0
 

Health.
Poison_Class
3 (Strong toxins)
Exposure effects
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea. May be harmful if swallowed.
   Inhalation
May cause respiratory tract irritation.
   Skin
May cause skin irritation.
   Eyes
May cause eye irritation.

First aid
 
   Ingestion
Do NOT induce vomiting. 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.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid if cough or other symptoms appear.
   Skin
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. Wash clothing before reuse.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
HS Code
2933 11 90