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DIMETHYL MERCURY
ICSC: 1304
Peer-Review Status: 05.07.2003 Validated
Mercury, dimethyl 
CAS #: 593-74-8 RTECS #: OW3010000
UN #: 2024
EC #: 080-007-00-3
EINECS #: 209-805-3
    Formula: (CH3)2Hg
Molecular mass: 230.7

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Highly flammable. Gives off irritating or toxic fumes (or gases) in a fire.  NO open flames, NO sparks and NO smoking.  Use water spray, powder, foam, carbon dioxide. 
EXPLOSION     In case of fire: keep drums, etc., cool by spraying with water. 
 
EXPOSURE   AVOID ALL CONTACT! AVOID EXPOSURE OF (PREGNANT) WOMEN!  IN ALL CASES CONSULT A DOCTOR! 
Inhalation Cough. Sore throat. Incoordination. Tremor. Confusion. Symptoms may be delayed. See Notes.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Refer for medical attention. 
Skin MAY BE ABSORBED! Redness. Pain.  Protective gloves. Protective clothing.  Rinse skin with plenty of water or shower. Refer for medical attention . 
Eyes Redness. Pain.  Wear safety goggles or eye protection in combination with breathing protection.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Abdominal pain. Nausea. Vomiting. Diarrhoea. Shock or collapse. Further see Inhalation.  Do not eat, drink, or smoke during work. Wash hands before eating.  Rinse mouth. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Wear protective gloves when inducing vomiting. Refer for medical attention . 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Remove all ignition sources. Personal protection: chemical protection suit including self-contained breathing apparatus. Do NOT let this chemical enter the environment. Collect leaking liquid in covered containers. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations. Do NOT wash away into sewer.  Do not transport with food and feedstuffs.
Severe marine pollutant. 
EC Classification
Symbol: T+, N; R: 26/27/28-33-50/53; S: (1/2)-13-28-36-45-60-61; Note: 1 for preparations 
UN Classification
UN Hazard Class: 6.1; UN Pack Group: I 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-61GT4-I.  Fireproof. Provision to contain effluent from fire extinguishing. Separated from food and feedstuffs, halogens and oxidants. Well closed. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS LIQUID. 

Physical dangers
The vapour is heavier than air and may travel along the ground; distant ignition possible. 

Chemical dangers
Decomposes on burning. This produces toxic gases including mercury oxides. Reacts with halogens and oxidants. This generates fire hazard. 

Occupational exposure limits
TLV (as Hg): 0.01 mg/m³ as TWA; 0.03 mg/m³ as STEL; (skin); (ACGIH 2003).
MAK: Carcinogen category: 3B; Skin absorption (H); Sensitization of skin (SH); (DFG 2002). 

Routes of exposure
The substance can be absorbed into the body by inhalation of its vapour, through the skin and by ingestion. 

Inhalation risk
A harmful contamination of the air can be reached very quickly on evaporation of this substance at 20°C. 

Effects of short-term exposure
The substance is irritating to the eyes, skin and respiratory tract. The substance may cause effects on the central nervous system. This may result in impaired functions. Exposure could cause death. The effects may be delayed. Medical observation is indicated. 

Effects of long-term or repeated exposure
The substance may have effects on the central nervous system. This may result in impaired functions. This substance is possibly carcinogenic to humans. Causes toxicity to human reproduction or development. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 93-94°C
Melting point: -43°C
Density: 2.961 g/cm³
Solubility in water: none
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.5
Flash point: 5°C 
The substance is very toxic to aquatic organisms. Bioaccumulation of this chemical may occur along the food chain, for example in seafood. The substance may cause long-term effects in the aquatic environment. 

NOTES
Depending on the degree of exposure, periodic medical examination is suggested.
Do NOT take working clothes home. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.


    See Also:
       Toxicological Abbreviations