Neopentyl glycol

  • Dimethylolpropane
  • Neopentylene glycol
  • 2,2-Dimethyl-1,3-propanediol
  • 2,2-Dimethylpropane-1,3-diol
Formula
(CH3)2C(CH2OH)2
Structure
Description
White crystalline solid.
Uses
Substance is used in the production of plasticizers, polyesters, as modifier of alkylated resins.

Registry Numbers and Inventories.
CAS
126-30-7
EC (EINECS/ELINCS)
204-781-0
EC Class
irritant
S 26 37/39
RTECS
TY5775000
RTECS class
Other
UN (DOT)
1325
Merck
12,6547
Beilstein/Gmelin
605291
Beilstein Reference
4-01-00-02551
Swiss Giftliste 1
G-8233
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C5H12O2
Formula mass
104.15
Melting point, °C
128 - 130
Boiling point, °C
208
Vapor pressure, mmHg
0.05 (25 C)
Vapor density (air=1)
3.6
Density
1.07 g/cm3 (20 C)
Solubility in water
1860 g/L
Viscosity
4.2 mPas 150C C
Partition coefficient, pKow
-0.34
Heat of fusion
4.3 kJ/mol
Heat of vaporization
51.9 kJ/mol

Hazards and Protection.
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Store protected from moisture.
Handling
Minimize dust generation and accumulation. Avoid breathing dust, vapor, mist, or gas. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation. Use with adequate ventilation. Wash clothing before reuse.
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
Vacuum or sweep up material and place into a suitable disposal container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Provide ventilation.
Disposal code
3
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Moisture, acid chlorides, acid anhydrides, strong oxidizing agents.
Decomposition
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
103
Autoignition, °C
375
Upper exp. limit, %
11.4
Lower exp. limit, %
1.1
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Water runoff can cause environmental damage. Dike and collect water used to fight fire. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Extinguishing media: Water may be ineffective. Use extinguishing media most appropriate for the surrounding fire. In case of fire, use water spray, dry chemical, carbon dioxide, or alcohol-resistant foam.
Fire potential
Flammable/combustible material. May be ignited by friction, heat, sparks or flames.
Combustion products
Emits toxic fumes under fire condition.
Health
1
 
Flammability
1
 
 
Reactivity
0
 

Health.
Poison_Class
4
Exposure effects
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea. The toxicological properties of this substance have not been fully investigated.
   Inhalation
The toxicological properties of this substance have not been fully investigated. Causes upper respiratory tract irritation. Causes irritation of the mucous membrane.
   Skin
Causes skin irritation. Causes redness and pain.
   Eyes
Causes eye irritation. Causes redness and pain.

First aid
 
   Ingestion
Never give anything by mouth to an unconscious person. Get medical aid. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Get medical aid. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
1325
Response guide
Hazard class
4.1
Packing Group
II; III
 
USCG CHRIS Code
DDI
 
20 Alcohols, Glycols
HS Code
2905 39 80
 
IMO Chemical Code
18
IMO Pollution Category
D