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Dimethylmercury

Dimethylmercury structure

CAS No:
593-74-8
Formula:
C2H6Hg
Chemical Name:
Dimethylmercury
Synonyms:
Mercury,dimethyl-;Dimethylmercury
Categories:
Agrochemicals > Pesticide Intermediates

Description

Dimethylmercury is an organic compound containing mercury, with the chemical formula C2H6Hg. It is volatile, flammable, highly toxic, and the most dangerous organic mercury compound known. It is harmful to the human nervous system, IQ, and memory, and a few microliters can be lethal. Dimethylmercury is a colorless liquid at room temperature and pressure, insoluble in water, stable in water, and can only react with inorganic acids at a significant rate at high temperatures, while the corresponding organic cadmium and organic zinc compounds (as well as most metal alkyls) are rapidly hydrolyzed. It is easily soluble in ethanol and ether, can penetrate latex, and dissolve rubber and raw rubber. The relative density of dimethylmercury is 3.1874 (20°C), the boiling point is 92°C (98.66kPa), the melting point is -43°C (98.7kPa), the flash point is 20°C, and the refractive index is 1.5452.

Dimethylmercury Basic Attributes

Molecular Weight：

230.662

Exact Mass：

232.01800

EC Number：

209-805-3

UNII：

C60TQU15XY

ICSC Number：

1304

UN Number：

2929|2024

DSSTox ID：

DTXSID5047742

Characteristics

PSA：

XLogP3：

2.59

Appearance：

COLOURLESS LIQUID.

Density：

2.961 g/cm³

Melting Point：

-43 °C

Boiling Point：

93-94 °C

Flash Point：

5°C

Refractive Index：

n20/D 1.543(lit.)

Water Solubility：

insoluble H2O; soluble ether, alcohol

Vapor Pressure：

Vapour pressure, kPa at 20°C: 8.8

Vapor Density：

Relative vapour density (air = 1): 7.96

Physical Dangers：

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

Safety Information

Packing level：

Hazard category：

3.1

Transport codes：

UN 3383

wgk germany：

hazard class code：

R26/27/28

safety instructions：

S26-S36

RTECS Number：

OW3010000

Marks：

T+,N

Storage features：

Fireproof. Separated from food and feedstuffs, halogens and oxidants. Well closed. Provision to contain effluent from fire extinguishing. Store in an area without drain or sewer access.

Stability/Shelf Life：

Stable. Highly flammable. Incompatible with strong oxidizing agents.

Precautionary statement(s)：

P260, P262, P264, P270, P271, P273, P280, P284, P301+P310, P302+P350, P304+P340, P310, P314, P320, P321, P322, P330, P361, P363, P391, P403+P233, P405, P501

Hazard Statements：

H300

Fire Hazards：

Highly flammable. Gives off irritating or toxic fumes (or gases) in a fire. Vapour/air mixtures are explosive. Heating will cause rise in pressure with risk of bursting.|Carcinogens, Flammable - 3rd degree

GHS Classification：

|Danger|H300 (100%): Fatal if swallowed [Danger Acute toxicity, oral]|P260, P262, P264, P270, P271, P273, P280, P284, P301+P310, P302+P350, P304+P340, P310, P314, P320, P321, P322, P330, P361, P363, P391, P403+P233, P405, and P501|Aggregated GHS information provided by 38 companies from 1 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.|H300: Fatal if swallowed [Danger Acute toxicity, oral]|H225: Highly Flammable liquid and vapor [Danger Flammable liquids]|P201, P202, P210, P233, P240, P241, P242, P243, P260, P263, P264, P270, P280, P281, P303+P361+P353, P307+P311, P308+P313, P314, P321, P370+P378, P403+P235, P405, and P501|P201, P202, P210, P233, P240, P241, P242, P243, P260, P264, P270, P280, P281, P303+P361+P353, P307+P311, P308+P313, P314, P321, P370+P378, P403+P235, P405, and P501

Fire Fighting：

Use powder, foam, carbon dioxide. In case of fire: keep drums, etc., cool by spraying with water.

Spillage Disposal：

Evacuate danger area! 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.

Safe Storage：

Fireproof. Separated from food and feedstuffs, halogens and oxidants. Well closed. Provision to contain effluent from fire extinguishing. Store in an area without drain or sewer access.

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 mildly irritating to the eyes, skin and respiratory tract. The substance may cause effects on the 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 Exposure：

The substance may have effects on the nervous system. This may result in impaired functions. This substance is possibly carcinogenic to humans. Causes toxicity to human reproduction or development.

Fire Prevention：

NO open flames, NO sparks and NO smoking. Closed system, ventilation, explosion-proof electrical equipment and lighting.

Exposure Prevention：

PREVENT GENERATION OF MISTS! AVOID ALL CONTACT! FIRST AID: USE PERSONAL PROTECTION. IN ALL CASES CONSULT A DOCTOR!

Inhalation Prevention：

Use ventilation, local exhaust or breathing protection.

Skin Prevention：

Protective gloves. Protective clothing.

Eye Prevention：

Wear safety goggles or eye protection in combination with breathing protection.

Drug Information

First Aid：

Fresh air, rest. Refer immediately for medical attention.

Wear protective gloves when administering first aid. Rinse contaminated clothes (fire hazard) with plenty of water. Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer immediately for medical attention .

First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.

MeSH Entry Terms：

dimethyl mercury

Exposure Routes：

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

Symptoms：

Cough. Incoordination. Tremor. Slurred speech. Confusion. Symptoms may be delayed.

EASILY ABSORBED! Redness. Further see Inhalation.

Redness. Pain.

Dimethylmercury Use and Manufacturing

Uses

As inorganic reagent. Dimethylmercury is used as a reagent ininorganic synthesis, and as a reference standardfor mercury nuclear magnetic resonance(Hg NMR). It is an environmental pollutantfound in bottom sediments and also inthe bodies of birds and marine mammalssuch as whales and fishes. It occurs in fishesand birds along with monomethylmercury. Inhumans, its presence is attributed to the consumptionof pilot whale meat, cod fish, andother sea food.

Manufacturing Info：

Mercury, dimethyl-: ACTIVE

Use Classification：

Food Contaminant -> METALS; -> JECFA Functional Classes|Fire Hazards -> Carcinogens, Flammable - 3rd degree

Food Additive Classes：

Food Contaminant -> METALS;

Computed Properties

Molecular Weight:230.66
Exact Mass:232.017594
Monoisotopic Mass:232.017594
Heavy Atom Count:3
Complexity:2.8
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes

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