1,2-Butanediol

  • Butane-1,2-diol
Formula
C4H10O2
Structure
Description
Colorless viscous viscous liquid.

Registry Numbers and Inventories.
CAS
26171-83-5
Beilstein/Gmelin
969169
Beilstein Reference
4-01-00-02507

Properties.
Formula
C4H10O2
Formula mass
90.12
Melting point, °C
-50
Boiling point, °C
194
Vapor pressure, mmHg
15 (99 C)
Vapor density (air=1)
3.1
Critical temperature
407
Critical pressure
51.42
Density
1.0189 g/cm3 (0 C)
Viscosity
106.00 cp (10.45 C)
Surface tension
31.2 g/s2 (25 C)
Refractive index
1.4391 (18 C)
Heat of vaporization
48.26 kJ/mol

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Keep container closed when not in use. 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. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid contact with heat, sparks and flame. Avoid ingestion and inhalation. 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 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.
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. Provide ventilation.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents, acid chlorides, acid anhydrides, strong reducing agents, chloroformates.
Decomposition
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
93
Autoignition, °C
390
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. Use water spray to keep fire-exposed containers cool. Combustible Liquid. Extinguishing media: Use water spray to cool fire-exposed containers. Use alcohol foam.
Health
1
 
Flammability
2
 
 
Reactivity
0
 

Health.
Exposure effects
May cause kidney injury. Exposure to large doses may cause central nervous system depression.
   Ingestion
May cause irritation of the digestive tract. May cause kidney damage. May cause central nervous system depression.
   Inhalation
May cause effects similar to those described for ingestion. May cause respiratory tract irritation.
   Skin
May cause skin irritation.
   Eyes
Causes eye irritation. May result in corneal injury.

First aid
 
   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
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
USCG CHRIS Code
BUG
 
20 Alcohols, Glycols
IMO Pollution Category
D