威敏钠

Description

Metham-Sodium · CAS 137-42-8 · C2H4NNaS2. UNII 3CD7UKN224. Solubility: In water, 7.22X10+5 mg/L at 20 °C; LogP: log Kow <1 at 25 °C.

Identification

CAS Registry Number	137-42-8
PubChem CID	5366415
Molecular formula	C2H4NNaS2
IUPAC name	sodium N-methylcarbamodithioate
UNII (FDA)	3CD7UKN224

Computed Descriptors

Molecular Weight	129.18
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	2
Rotatable Bond Count	0
Exact Mass	128.96828576
Monoisotopic Mass	128.96828576
Topological Polar Surface Area	45.1
Heavy Atom Count	6
Formal Charge	0
Complexity	46.8

Physical & Chemical Properties

Solubility	In water, 7.22X10+5 mg/L at 20 °C
LogP	log Kow <1 at 25 °C

Physical description & handling notes

• White crystals; [HSDB] Aqueous solution: Yellow to light yellow-green liquid with an odor of amine and sulfur; [CAMEO] White solid with an odor of sweet onions; [EFSA] White crystals; [Aldrich MSDS]
• White crystals
• White crystalline solid
• BP: 110 °C /Commercial product/
• Decomposes without melting
• Crystals; anhydrous at 130 °C; moderately sol in alcohol; 72.2 g/100 mL water at 20 °C; moderately sol in alcohol; sparingly sol in other solvents; unpleasant odor, similar to that of disulfide. /Sodium methyldithiocarbamate dihydrate/

GHS Hazard Classification

Reported hazard statements	H302, H314, H317, H400, H410, H311 (75.8%), H319 (55.9%), H332 (19.9%)

Documented Uses

• Applying Wood Preservatives [Category: Other]
• Sewer and Wastewater Treatment [Category: Industry]
• Leather Tanning and Processing [Category: Industry]
• Metam-sodium and metam-potassium are broad spectrum fumigants with fungicidal, bactericidal, algaecide, herbicidal, insecticidal, nematicidal, and antimicrobial properties. They are dithiocarbamate salts that break down quickly in the environment to the primary toxic degradate, methyl isothiocyanate (MITC). MITC is highly volatile and is responsible for the fumigant properties of metam-sodium and metam-potassium.
• Soil fumigant to control weeds and weed seeds, nematodes, fungi, amd soil insects
• For more Uses (Complete) data for SODIUM METHYLDITHIOCARBAMATE (11 total), please visit the HSDB record page.

Synonyms

Metam-sodium; Metam sodium; Carbathione; Carbothion; Metamsodium; Trimaton; SMDC; Carbation; Karbation; Masposol; Mapasol; Sepivam; Sistan; Sometam; Carbam; Geort

Frequently Asked Questions

What are the CAS number and molecular formula of Metham-Sodium?

CAS 137-42-8; molecular formula C2H4NNaS2; molecular weight — g/mol.

What other names is Metham-Sodium known by?

Metam-sodium, Metam sodium, Carbathione, Carbothion, Metamsodium, Trimaton.

Is Metham-Sodium classified as hazardous?

Hazard statements reported: H302, H314, H317, H400, H410.

What are the key physical properties of Metham-Sodium?

Solubility: In water, 7.22X10+5 mg/L at 20 °C; LogP: log Kow <1 at 25 °C.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.