Supplier Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity Transport Information
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1H-Pyrazole(288-13-1)

Supplier Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity Transport Information

Product Identification

Product Name
1H-Pyrazole
Synonyms
1,2-Diazole
CAS
288-13-1
Formula
C3H4N2
Molecular Weight
68.08
EINECS
206-017-1
RTECS
UQ4900000
RTECS Class
Reproductive Effector
Merck
12,8144
Beilstein/Gmelin
103775
Beilstein Reference
5-23-04-00122
EC Class
harmful, irritant

Physical and Chemical Properties

Appearance
Colorless crystals.
Solubility in water
Very soluble
Melting Point
66 - 68
Boiling Point
186
Vapor Pressure
0.89 (25 C)
Density
1.026 - 0.952 g/cm3 (70 - 155 C)
pKa/pKb
11.53 (pKb)
Partition Coefficient
.32
Heat Of Vaporization
40.6 kJ/mol
Heat Of Combustion
-1858 kJ/mol
Usage
Chelating agent.
Refractive Index
1.4203 (20 C)

First Aid Measures

Ingestion
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 immediately.
Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. 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 immediately.

Handling and Storage

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. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation.

Hazards Identification

Inhalation
Inhalation of dust may cause respiratory tract irritation.
Skin
May cause skin irritation.
Eyes
May cause eye irritation.
Ingestion
May be harmful if swallowed.
Hazards
During a fire, irritating and highly toxic gasesmay be generated by thermal decomposition or combustion.
EC Risk Phrase
R 22 36/37/38
EC Safety Phrase
S 26 36/37/39

Exposure Controls/Personal Protection

Personal 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.
Exposure Effects
May cause reproductive and fetal effects.

Fire Fighting Measures

Flash Point
88
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. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.

Accidental Release Measures

Small spills/leaks
Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions. Provide ventilation.

Stability and Reactivity

Disposal Code
3
Incompatibilities
Oxidizing agents, acids.
Stability
Stable under normal temperatures and pressures.
Decomposition
Nitrogen oxides, carbon monoxide, carbon dioxide, nitrogen.

Transport Information

HS Code
2933 19 90
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