1-Ethynylnaphthalene

  • a-Ethynylnaphthalene
  • 1-Naphthylacetylene
  • 1-Naphthylethyne
Formula
C12H8
Structure
Description
Gold colored liquid.

Registry Numbers and Inventories.
CAS
15727-65-8
UN (DOT)
1993
Beilstein Reference
3-05-00-01935

Properties.
Formula
C12H8
Formula mass
152.19
Boiling point, °C
270
Vapor pressure, mmHg
0.011 (25 C)
Critical temperature
536
Critical pressure
35.78
Density
1.070 g/cm3 (25 C)
Solubility in water
72 mg/L (25 C)
Refractive index
1.6500 (20 C)
Partition coefficient, pKow
3.63
Heat of vaporization
48.81 kJ/mol

Hazards and Protection.
Storage
Keep container closed. Keep away from heat, sparks, and open flame.
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, sand, or soda ash. Place in covered containers using non-sparking tools and transport outdoors. Ventilate area and wash spill site after material pickup is complete.
Stability
Stable if stored as directed.
Incompatibilities
Strong oxidizing agents.
Decomposition
Oxides of carbon

Fire.
Flash Point,°C
57
Fire fighting
For small (incipient) fires, use media such as alcohol foam, dry chemical, or carbon dioxide. For large fires, apply water from as far as possible. Use very large quantities (flooding) of water applied as a mist or spray; solid streams of water may be ineffective. Cool all affected containers with flooding quantities of water. Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.
Fire potential
Flammable liquid.
Hazards
Emits toxic fumes under fire conditions.
Health
0
 
Flammability
3
 
 
Reactivity
0
 

Health.
Exposure effects
   Ingestion
May be harmful if swallowed.
   Inhalation
Material may be irritating to mucous membranes and upper respiratory tract. May be harmful if inhaled.
   Skin
May cause skin irritation. May be harmful if absorbed through the skin.
   Eyes
May cause 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.
UN number
1993
Response guide
Hazard class
3
Packing Group
III