Propargyl alcohol

  • 2-Propyn-1-ol
  • 2-Propynyl alcohol
  • 1-Propyn-3-ol
  • Prop-2-yn-1-ol
Formula HC CCH2OH
Structure
Description Clear, colorless to straw-colored, moderately volatile liquid, mild geranium-like odor, lachrymator.
Uses Has been used to prevent hydrogen embrittlement of steel, as corrosion inhibitor, solvent stabilizer, soil fumigant, chemical intermediate.

Registry Numbers and Inventories.
CAS 107-19-7
EC (EINECS/ELINCS) 203-471-2
EC Index Number 603-078-00-X
EC Class Flammable; Toxic; Corrosive; Dangerous for the Environment
EC Risk Phrase R 10 23/24/25 34 51/53
EC Safety Phrase S 26 28 36 45 61
RTECS UK5075000
RTECS class Agricultural Chemical and Pesticide; Tumorigen; Mutagen
UN (DOT) 1986
Merck 12,7993
Beilstein/Gmelin 506003
Beilstein Reference 4-01-00-02214
RCRA P102
EPA OPP 68702
Swiss Giftliste 1 G-2815
Canada DSL/NDSL DSL
US TSCA Listed
Austrailia AICS Listed
New Zealand Listed
Japan ENCS (MITI) Listed
Korea ECL Listed

Properties.
Formula C3H4O
Formula mass 56.06
Melting point, °C -53
Boiling point, °C 114
Vapor pressure, mmHg 11 (25 C)
Vapor density (air=1) 1.93
Saturation Concentration Approximately 15300 ppm (1.53%) at 20 C (calculated)
Density 0.9485 g/cm3 (20 C)
Solubility in water Soluble
Viscosity 1.65 cp (20 C)
Surface tension 36 g/s2
Refractive index 1.4295 (20 C)
pKa/pKb 13.21 (pKa)
Partition coefficient, pKow -0.38
Heat of vaporization 41.0 kJ/mol
Heat of combustion -1805 kJ/mol

Hazards and Protection.
Storage Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Flammables-area. Refrigerator/flammables.
WHMIS B2 D1A D2B E
Handling Wash thoroughly after handling. Ground and bond containers when transferring material. Use spark-proof tools and explosion proof equipment. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid contact with heat, sparks and flame. Do not ingest or inhale. Use with adequate ventilation. Discard contaminated shoes. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
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 a chemical apron. Wear appropriate protective clothing to prevent skin exposure.
Respirators A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use. 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 Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Clean up spills immediately, using the appropriate protective equipment. Remove all sources of ignition. Use a spark-proof tool. Provide ventilation. A vapor suppressing foam may be used to reduce vapors.
Disposal code 9
Stability Stable under normal temperatures and pressures.
Incompatibilities Incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides Flammable gaseous hydrogen is generated in combination with strong reducing agents, such as hydrides Reacts violently with alcohols or water.
Decomposition Carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C 33
Autoignition, °C 365
Upper exp. limit, % 86.2
Lower exp. limit, % 1.9
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. Will burn if involved in a fire. Use water spray to keep fire-exposed containers cool. Containers may explode in the heat of a fire. Extinguishing media: For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam. For large fires, use water spray, fog, or alcohol-resistant foam. Use water spray to cool fire-exposed containers. Water may be ineffective. Do NOT use straight streams of water.
Fire potential Quite flammable.
Hazards Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion and poison hazard indoors, outdoors or in sewers.
Combustion products Acrid smoke, fumes
NFPA Health 4
  Flammability 3  
  Reactivity 3  

Health.
Exposure limit(s) TLV: 1 ppm; 2.3 mg/m3 (skin) (ACGIH 1996). MAK: 2 ppm; 5 mg/m3; H (1995). NIOSH REL: TWA 1 ppm (2 mg/m3) skin
Poison_Class 3
Exposure effects Headache, dizziness, giddiness, ataxia, sedation and coma may occur.
   Ingestion May be fatal if swallowed. May cause severe and permanent damage to the digestive tract. Causes gastrointestinal tract burns.
   Inhalation Harmful if inhaled. Causes chemical burns to the respiratory tract. Vapors may cause dizziness or suffocation.
   Skin May be fatal if absorbed through the skin. Causes skin burns.
   Eyes Causes eye burns. Lachrymator.

First aid
 
   Ingestion Do NOT induce vomiting. 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 Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration.
   Skin Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Destroy contaminated shoes.
   Eyes Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed. Extensive irrigation is required (at least 30 minutes).

Transport.
UN number 1986
Response guide 131
Hazard class 3
Packing Group I; II; III  
USCG CHRIS Code PRO  
HS Code 2905 29 90  
Std. Transport # 4907830