Product Identification

Product Name

Metham sodium

Synonyms

Carbam
Carbathion
Carbathione
Carbation
Karbation
Sodium methylaminomethanedithioate

CAS

137-42-8

Formula

C2H5NNaS2

Molecular Weight

107.18

EINECS

205-293-0

RTECS

FC2100000

RTECS Class

Agricultural Chemical and Pesticide; Reproductive Effector

Merck

12,6016

Beilstein/Gmelin

3630657

EC Index Number

006-013-00-8

EC Class

Harmful; Contact with acids liberates toxic gas; Corrosive; Sensitising; Dangerous for the Environment

Physical and Chemical Properties

Appearance

A yellow to light yellow-green aqueous solution with an odor of amine and sulfur that varies in intensity.

Solubility in water

722 g/L at 20 C

Density

1.16 g/cm3 (20 C)

Heat Of Vaporization

Usage

Soil fumigant for fungi, bacteria, nematodes, insects.

First Aid Measures

Ingestion

Ipecac-induced vomiting is not recommended because of the potential for cns depression and seizures. Consider after ingestion of a potentially life-threatening amount of poison if it can be performed soon after ingestion (generally within 1 hour). Activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents. Intravenous fluids may be useful in restoring extracellular fluid volume following severe vomiting and diarrhea.

Inhalation

Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.

Skin

Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists.

Eyes

Immediately flush with running water for at least 20 minutes.

Handling and Storage

Storage

Keep in well ventilated area.

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.

Hazards Identification

Inhalation

Respiratory failure, requiring ventilatory support, has been reported following ingestions.

Skin

Exposure to dusts, sprays, solutions, wettable powder suspensions or emulsions of these agents may lead to skin and mucous membrane irritation.

Eyes

See Inhalation.

Ingestion

Nausea, vomiting and diarrhea may occur.

UN (DOT)

2771

Exposure Controls/Personal Protection

Personal Protection

Clothing and equipment should be consistent with good pesticide handling. For those engaged in spraying, eye protective equipment and respiratory protected equipment may well be essential.

Respirators

Wear positive pressure self-contained breathing apparatus (SCBA).

Exposure Effects

Exposure to thiram or mbdt-carb (based on animal studies) may cause weakness, ataxia, ascending paralysis and hypothermia. Peripheral neuropathy (pain, numbness and weakness of the extremities) has been noted following exposure to thiuram (the ethyl analog of thiram). No adverse reproductive effects (testicular parameters) in male mice were observed following methyl thiophanate doses up to 1000 mg/kg orally for 5 consecutive days (Traina et al, 1998). Maternal toxicity was evident in female rats.

Poison Class

2

Fire Fighting Measures

Fire Fighting

Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Use water in flooding quantities as fog. Keep run-off water out of sewers and water sources.

Fire Potential

Non-Combustible

Accidental Release Measures

Small spills/leaks

Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Do not use water. Attempt to stop leak if without undue personnel hazard. Apply water spray or mist to knock down vapors. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Absorb bulk liquid with fly ash, cement powder, or commercial sorbents. Water spill: Remove trapped material with suction hoses. Use mechanical dredges or lifts to remove immobilized masses of pollutants and precipitates.

Stability and Reactivity

Incompatibilities

Incompatible with acids, peroxides, and acid halides.

Stability

No data.

Combustion Products

Fire may produce irritating, corrosive and/or toxic gases.

Transport Information

UN Number

2771

Hazard Class

6.1

Packing Group

I; II; III