Sodium methanearsonate

Modify Date: 2024-01-04 10:37:35

Sodium methanearsonate Structure
Sodium methanearsonate structure
Common Name Sodium methanearsonate
CAS Number 2163-80-6 Molecular Weight 161.95200
Density 1.5 Boiling Point 393.3ºC at 760 mmHg
Molecular Formula CH4AsNaO3 Melting Point 113-116ºC
MSDS Chinese USA Flash Point 205.8ºC
Symbol GHS06 GHS09
GHS06, GHS09
Signal Word Danger

 Use of Sodium methanearsonate


Sodium methanearsonate is also known as Monosodium Acid Methane Arsonate Sesquihydrate. It is an environmental toxic compound. It also functions as a commonly used herbicide for weed control in grass.

 Names

Name msma
Synonym More Synonyms

 Chemical & Physical Properties

Density 1.5
Boiling Point 393.3ºC at 760 mmHg
Melting Point 113-116ºC
Molecular Formula CH4AsNaO3
Molecular Weight 161.95200
Flash Point 205.8ºC
Exact Mass 161.92700
PSA 60.36000
Water Solubility >=10 g/100 mL at 22 ºC

 Toxicological Information

CHEMICAL IDENTIFICATION

RTECS NUMBER :
PA2625000
CHEMICAL NAME :
Methanearsonic acid, monosodium salt
CAS REGISTRY NUMBER :
2163-80-6
LAST UPDATED :
199712
DATA ITEMS CITED :
46
MOLECULAR FORMULA :
C-H4-As-O3.Na
MOLECULAR WEIGHT :
161.96
WISWESSER LINE NOTATION :
Q-AS-QO&1 &-NA-

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :
Open irritation test
ROUTE OF EXPOSURE :
Administration onto the skin
SPECIES OBSERVED :
Rodent - rabbit
TYPE OF TEST :
Standard Draize test
ROUTE OF EXPOSURE :
Administration into the eye
SPECIES OBSERVED :
Rodent - rabbit
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
700 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LC50 - Lethal concentration, 50 percent kill
ROUTE OF EXPOSURE :
Inhalation
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
>20 gm/m3
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
300 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rabbit
DOSE/DURATION :
102 mg/kg
TOXIC EFFECTS :
Behavioral - muscle weakness Gastrointestinal - hypermotility, diarrhea Kidney, Ureter, Bladder - urine volume decreased
TYPE OF TEST :
LC50 - Lethal concentration, 50 percent kill
ROUTE OF EXPOSURE :
Inhalation
SPECIES OBSERVED :
Rodent - rabbit
DOSE/DURATION :
>20 gm/m3/4H
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Administration onto the skin
SPECIES OBSERVED :
Rodent - rabbit
DOSE/DURATION :
2500 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Mammal - cattle
DOSE/DURATION :
230 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Unreported
SPECIES OBSERVED :
Mammal - species unspecified
DOSE/DURATION :
50 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
1986 mg/kg/21D-C
TOXIC EFFECTS :
Related to Chronic Data - death
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
8628 mg/kg/60D-C
TOXIC EFFECTS :
Endocrine - hypoglycemia Blood - pigmented or nucleated red blood cells Blood - changes in other cell count (unspecified)
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Mammal - cattle
DOSE/DURATION :
100 mg/kg/10D-I
TOXIC EFFECTS :
Gastrointestinal - gastritis Kidney, Ureter, Bladder - other changes Related to Chronic Data - death

MUTATION DATA

TYPE OF TEST :
Mutation in mammalian somatic cells
TEST SYSTEM :
Rodent - mouse Lymphocyte
DOSE/DURATION :
4 gm/L
REFERENCE :
MUREAV Mutation Research. (Elsevier Science Pub. B.V., POB 211, 1000 AE Amsterdam, Netherlands) V.1- 1964- Volume(issue)/page/year: 386,279,1997 *** U.S. STANDARDS AND REGULATIONS *** EPA FIFRA 1988 PESTICIDE SUBJECT TO REGISTRATION OR RE-REGISTRATION FEREAC Federal Register. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) V.1- 1936- Volume(issue)/page/year: 54,7740,1989 MSHA STANDARD-air:TWA 0.5 mg(As)/m3 DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) booklet issues by American Conference of Governmental Industrial Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: 3,16,1971 OSHA PEL (Gen Indu):8H TWA 0.5 mg(As)/m3 CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1910.1000,1994 OSHA PEL (Construc):8H TWA 0.5 mg(As)/m3 CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1926.55,1994 OSHA PEL (Shipyard):8H TWA 0.5 mg(As)/m3 CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1915.1000,1993 OSHA PEL (Fed Cont):8H TWA 0.5 mg(As)/m3 CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 41,50-204.50,1994 *** OCCUPATIONAL EXPOSURE LIMITS *** OEL-ARAB Republic of Egypt:TWA 0.2 mg(As)/m3 JAN 1993 OEL-AUSTRALIA:TWA 0.05 mg(As)/m3;Carcinogen JAN 1993 OEL-BELGIUM:TWA 0.2 mg(As)/m3 JAN 1993 OEL-DENMARK:TWA 0.05 mg(As)/m3 JAN 1993 OEL-FINLAND;Carcinogen JAN 1993 OEL-FRANCE:TWA 0.2 mg(As)/m3 JAN 1993 OEL-HUNGARY:STEL 0.5 mg(As)/m3;Carcinogen JAN 1993 OEL-INDIA:TWA 0.2 mg(As)/m3 JAN 1993 OEL-THE PHILIPPINES:TWA 0.5 mg(As)/m3 JAN 1993 OEL-POLAND:TWA 0.3 mg(As)/m3 JAN 1993 OEL-SWEDEN:TWA 0.03 mg(As)/m3;Carcinogen JAN 1993 OEL-SWITZERLAND:TWA 0.1 mg(As)/m3;Carcinogen JAN 1993 OEL-THAILAND:TWA 0.5 mg(As)/m3 JAN 1993 OEL-TURKEY:TWA 0.5 mg(As)/m3 JAN 1993 OEL-UNITED KINGDOM:TWA 0.2 mg(As)/m3 JAN 1993 OEL IN BULGARIA, COLOMBIA, JORDAN, KOREA check ACGIH TLV OEL IN NEW ZEALAND, SINGAPORE, VIETNAM check ACGIH TLV *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOHS - National Occupational Hazard Survey (1974) NOHS Hazard Code - A1796 No. of Facilities: 78 (estimated) No. of Industries: 1 No. of Occupations: 1 No. of Employees: 235 (estimated) NOHS - National Occupational Hazard Survey (1974) NOHS Hazard Code - T0703 No. of Facilities: 34 (estimated) No. of Industries: 1 No. of Occupations: 1 No. of Employees: 136 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - T0703 No. of Facilities: 139 (estimated) No. of Industries: 1 No. of Occupations: 3 No. of Employees: 3472 (estimated)

 Safety Information

Symbol GHS06 GHS09
GHS06, GHS09
Signal Word Danger
Hazard Statements H301 + H331-H410
Precautionary Statements Missing Phrase - N15.00950417-P261-P304 + P340 + P312-P403 + P233
Hazard Codes Xn: Harmful;
Risk Phrases R22
Safety Phrases 20/21-28-45-60-61
RIDADR UN 1557
RTECS PA2625000
Packaging Group III
Hazard Class 6.1(b)

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 Synonyms

asazol
Sodium methylarsonate
herbanm
drexar
sodium hydrogen As-methylarsonate
bueno
monate
monex
gepiron
merge
bueno6
sodium hydrogen methylarsonate
EINECS 218-495-9
phyban