Water, heavy

  • Deuterium oxide
  • Dideuterium oxide
  • Heavy water
  • Heavy water d2
Formula
[2H]2O
Structure
Description
odorless clear, colorless liquid
Uses
To study chemical reaction rates and mechanisms.

Registry Numbers and Inventories.
CAS
7789-20-0
EC (EINECS/ELINCS)
232-148-9
RTECS
ZC0230000
RTECS class
Mutagen; Reproductive Effector
Merck
12,2984
Beilstein/Gmelin
97 (G)
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Korea ECL
Listed

Properties.
Formula
D2O
Formula mass
20.03
Melting point, °C
3.8
Boiling point, °C
101.3
Vapor pressure, mmHg
16.4
Evaporization number
1 (butyl acetate=1)
Density
1.1 g/cm3
Solubility in water
Soluble
Viscosity
0.00255 cp (125 C)
Thermal expansion
0.00027313/K
Heat of fusion
6.2 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry place. Store in a tightly closed container. Store protected from moisture.
Handling
Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes. Keep container tightly closed.
Protection
Eyes: Wear chemical goggles. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear a chemical apron.
Respirators
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.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
None.

Fire.
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 agent most appropriate to extinguish fire.
Health
0
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure effects
   Ingestion
Low hazard for usual industrial handling.
   Inhalation
Low hazard for usual industrial handling.
   Skin
Non-irritating to the skin.
   Eyes
Non-irritating to the eyes.

First aid
 
   Ingestion
Get medical aid if irritation or symptoms occur.
   Inhalation
Get medical aid if cough or other symptoms appear.
   Skin
Get medical aid if irritation develops or persists.
   Eyes
If irritation develops, get medical aid.

Transport.
HS Code
2845 10 00