4-Pyrazolino-2-butanone

  • Oxalyl monoguanylhydrazide
  • Oxalic acid, 2-amidinohydrazide
  • Ethanedioic acid, mono[2-(aminoiminomethyl)hydrazide]
Formula
C3H6N4O3
Structure
Description
Clear orange liquid.

Registry Numbers and Inventories.
CAS
89797-67-1
Beilstein/Gmelin
1707916
Beilstein Reference
0-03-00-00120

Properties.
Formula
C3H6N4O3
Formula mass
146.10
Melting point, °C
231 - 232
Solubility in water
Very soluble
pKa/pKb
4.13 (pKa)
Partition coefficient, pKow
0.09

Hazards and Protection.
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling
Wash thoroughly after handling. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Do not breathe dust, vapor, mist, or gas. Keep container tightly closed. Avoid ingestion and inhalation. Use only in a chemical fume hood.
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
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Clean up spills immediately, using the appropriate protective equipment. Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Provide ventilation.
Stability
Stability unknown.
Incompatibilities
Oxidizing agents.
Decomposition
Carbon monoxide, oxides of nitrogen, irritating and toxic fumes and gases, carbon dioxide.

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. Extinguishing media: Use agent most appropriate to extinguish fire.

Health.
Exposure effects
   Ingestion
May cause irritation of the digestive tract. No information found. The toxicological properties of this substance have not been fully investigated.
   Inhalation
May cause respiratory tract irritation. No information available. The toxicological properties of this substance have not been fully investigated.
   Skin
May cause skin irritation. No information regarding skin irritation and other potential effects was found. The toxicological properties of this material have not been fully investigated.
   Eyes
May cause eye irritation. No information regarding eye irritation and other potential effects was found. The toxicological properties of this material have not been fully investigated.

First aid
 
   Ingestion
Never give anything by mouth to an unconscious person. Get medical aid. Wash mouth out with water.
   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.