Dimethyl zinc

  • Zinc dimethyl
Formula
Zn(CH3)2
Structure
Description
Mobile liquid, with peculiar garlic odor.
Uses
Vulcanization acceleration, fungicide.

Registry Numbers and Inventories.
CAS
544-97-8
EC (EINECS/ELINCS)
208-884-1
EC Index Number
030-004-00-8
EC Class
Reacts violently with water; Highly flammable; Corrosive; Dangerous for the Environment
UN (DOT)
1370
Merck
12,3312
Beilstein/Gmelin
3587195
Beilstein Reference
4-04-00-04423
Canada DSL/NDSL
NDSL
US TSCA
Listed

Properties.
Formula
C2H6Zn
Formula mass
95.46
Melting point, °C
-42.2
Boiling point, °C
46
Vapor pressure, mmHg
123 (0 C)
Density
1.38 g/cm3 (20 C)
Solubility in water
Decomposes
Viscosity
0.807 cp at 70 deg f
Surface tension
18 g/s2
Heat of vaporization
29.9 kJ/mol

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Personal protection:
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Do not use water. Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Keep material dry.
Stability
Stable in sealed tube and under carbon dioxide.
Incompatibilities
Reacts spontaneously with air or oxygen and violently with water, evolving methane. Explodes in an oxygen atmosphere. Explosive reaction on contact with water; 2,2-dichloropropane.
Decomposition
When heated to decomposition, emits toxic fumes of zinc oxide.

Fire.
Flash Point,°C
-40
Autoignition, °C
-18
Fire fighting
Do not extinguish fire unless flow can be stopped. Do not use water. Use graphite, soda ash, powdered sodium chloride, or suitable dry powder.
Fire potential
Ignites in air (owing to peroxide formation).
Hazards
Contact with water applied to adjacent fires will intensify fire.
Combustion products
Smoke contains zinc oxide, which can irritate lungs and cause metal fume fever.

Health.
Exposure effects
Headache, myalgias, weakness, and paresthesias in both feet have been reported.
   Ingestion
Ingestion - zinc salts (especially zinc sulfate) produce gastritis ranging from a burning pain in the mouth and throat to intense gastric and substernal pain, strictures, violent vomiting, diarrhea, shock, and possible death.
   Inhalation
Inhalation of decomposition products may cause severe injury or death.
   Skin
Hives may rarely occur.
   Eyes
Flushing, dry throat, blurred vision, and stiff neck have been reported. A sweet or metallic taste is common.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
Highly unlikely, as liquid or vapor either ignites spontaneously or reacts with moisture to form methane and zinc oxide. Move victim to clean air and administer mouth-to-mouth resuscitation if breathing has ceased; give oxygen only when authorized by physician; keep victim warm and comfortable; call physician immediately.
   Skin
Immediately flush affected area with large volumes of water; do not attempt to neutralize with chemicals; get medical attention if irritation persists.
   Eyes
In case of contact with substance, immediately flush with running water for at least 20 minutes.

Transport.
UN number
1370
Response guide
Hazard class
4.2
Packing Group
I
 
USCG CHRIS Code
DMZ
 
Std. Transport #
4916135