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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3,5-Dimethylpyrazole(67-51-6)

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
3,5-Dimethylpyrazole
Synonyms
,5-Dimethylpyrazole
1,2,3-Triazole
1H-3,5-Dimethylpyrazole
2H-1,2,3-Triazole
2H-Triazole
Osotriazole
Pyrrodiazole
TH 564
Triazacyclopentadiene
U 6245
CAS
288-36-8
CAS
67-51-6
Formula
C2H3N3
Formula
C5H8N2
Molecular Weight
69.06
Molecular Weight
96.13
EINECS
200-657-5
RTECS
UQ6477600
RTECS Class
Drug
Beilstein/Gmelin
104766
Beilstein/Gmelin
106325
Beilstein Reference
4-26-00-00029
Beilstein Reference
5-23-05-00110

Physical and Chemical Properties

Appearance
Solid.
Appearance
White powder.
Solubility in water
Soluble
Solubility in water
Very soluble
Melting Point
23-25
Boiling Point
208
Boiling Point
218
Vapor Pressure
0.2 (25 C)
Vapor Pressure
0.4 (25 C)
Density
0.8839 g/cm3 (16C)
Density
1.192 g/cm3
pKa/pKb
9.00 (pKa)
pKa/pKb
9.74 (pKb)
Partition Coefficient
.23
Partition Coefficient
1.24
Heat Of Vaporization
42.1 kJ/mol
Heat Of Vaporization
43.6 kJ/mol
Heat Of Combustion
-3130 kJ/mol
Usage
Building block for more complex chemical compounds, such as pharmaceutical drugs like tazobactam.
Refractive Index
1.4854 (25 C)

First Aid Measures

Ingestion
Get medical aid. Wash mouth out with water.
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.
Inhalation
Causes respiratory tract irritation. May be harmful if inhaled.
Skin
Causes skin irritation. May be harmful if absorbed through the skin.
Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
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.
Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.
Eyes
Causes eye irritation.

Handling and Storage

Storage
Store in a cool, dry place. Store in a tightly closed container.
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation.
Handling
Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes.

Hazards Identification

Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea. The toxicological properties of this substance have not been fully investigated.
Ingestion
May cause irritation of the digestive tract. May be harmful if swallowed.
Inhalation
May cause respiratory tract irritation. The toxicological properties of this substance have not been fully investigated.
Skin
May cause skin irritation. The toxicological properties of this material have not been fully investigated.
Eyes
May cause eye irritation. The toxicological properties of this material have not been fully investigated.
EC Risk Phrase
R 22
EC Risk Phrase
R 22 36/37/38
EC Safety Phrase
S 26 36/37/39
EC Safety Phrase
S 36/37

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.
Personal Protection
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.

Fire Fighting Measures

Flash Point
107
Flash Point
91
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. Use agent most appropriate to extinguish fire. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Fire Fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam.

Accidental Release Measures

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. Avoid generating dusty conditions. Provide ventilation.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container.

Stability and Reactivity

Stability
No data.
Incompatibilities
Oxidizing agents.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents, acids, acetic anhydride, acid chlorides, carbon dioxide.
Disposal Code
5
Decomposition
Nitrogen oxides, carbon monoxide, carbon dioxide.
Decomposition
Nitrogen oxides, carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Transport Information

HS Code
2933 19 90
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