5,7-Dodecadiyne

  • Dibutylbutadiyne
Formula
C12H18
Structure

Registry Numbers and Inventories.
CAS
1120-29-2
36/37/38
26 37/39
Beilstein Reference
4-01-00-01130

Properties.
Formula
C12H18
Formula mass
162.27
Melting point, °C
164
Boiling point, °C
251
Vapor pressure, mmHg
0.034 (25 C)
Critical temperature
444
Critical pressure
23.49
Density
0.827 g/cm3 (25 C)
Solubility in water
0.15 mg/L (25 C)
Refractive index
1.489 (20 C)
Partition coefficient, pKow
5.43
Heat of vaporization
46.83 kJ/mol

Hazards and Protection.
Storage
Keep tightly closed. Keep away from heat and open flame. Store at 2-8 C.
Protection
Compatible chemical-resistant gloves. Chemical safety goggles. Protective clothing.
Respirators
Use respirators and components tested and approved under appropriate government standards such as NIOSH (US) or CEN (EU). Where risk assessment shows air-purifying respirators are appropriate use a full-face respirator with multi-purpose combination (US) or type ABEK (EN 14387) respirator cartridges as a backup to engineering controls. If the respirator is the sole means of protection, use a full-face supplied air respirator.
Small spills/leaks
Cover with dry lime or soda ash, pick up, keep in a closed container, and hold for waste disposal. Ventilate area and wash spill site after material pickup is complete.
Incompatibilities
Strong oxidizing agents.
Decomposition
Oxides of carbon.

Fire.
Flash Point,°C
105
Fire fighting
Extinguish with water spray, carbon dioxide, dry chemical powder or appropriate foam. Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.
Fire potential
Combustible liquid.
Hazards
Emits toxic fumes under fire conditions.

Health.
Exposure effects
Vapor or mist is irritating to the eyes, mucous membranes, and upper respiratory tract. May be harmful by inhalation, ingestion, or skin absorption.
   Skin
Causes skin irritation.

First aid
 
   Ingestion
If swallowed, wash out mouth with water provided person is conscious. Call a physician.
   Inhalation
If inhaled, remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen.
   Skin
In case of contact, immediately wash skin with soap and copious amounts of water. Remove contaminated clothing and shoes. Call a physician.
   Eyes
In case of contact with eyes, flush with copious amounts of water for at least 15 minutes. Assure adequate flushing by separating the eyelids with fingers. Call a physician.

Transport.