PAN Pesticides Database - Chemicals

DSMA - Identification, toxicity, use, water pollution potential, ecological toxicity and regulatory information

Note: See Working with the Information on this Page section below for important notes about this data.

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Identifying information, including synonyms, ID numbers, use type, chemical classification, a link to a list of all products containing this chemical and a list of the top crops this pesticide is used on in California.
Signs and symptoms of poisoning, first aid, and links to treatment information for this chemical.
Link to information on toxicity to humans, including carcinogenicity, reproductive and developmental toxicity, neurotoxicity, and acute toxicity.
Links to world-wide registration status as well as regulatory information for the U.S. and California.
Water quality standards and physical properties affecting water contamination potential.
Toxicity to aquatic organisms.
List of chemicals in the same family, including breakdown products, salts, esters, isomers, and other derivatives.
 

Chemical Identification and Use for DSMA

Basic Identification Information About This Chemical
Chemical Name: DSMA
CAS Number: 144-21-8
U.S. EPA PC Code: 013802
CA DPR Chem Code: 251
Molecular Weight: 183.9
Use Type: Defoliant , Herbicide
Chem Class: Heavy metal , Organoarsenic
View Related Chemicals
 
Additional Resources About This Chemical Class and Use Type

See the Global Pesticide Resources page for many additional links.

Historical Use of this Chemical
Top five crops and sites for this pesticide in California
Landscape   Greenhouse Flowers  
View All Crops and Sites
 
Other Names for this Chemical
About Chemical Synonyms
00251 (CA DPR Chem Code Text) , 00251 (CA DPR Chem Code) , 013802 (US EPA PC Code Text) , 13802 (US EPA PC Code) , 144-21-8 (CAS number) , 144218 , 144218 (CAS number without hyphens) , 2,4-D (DMA) , 251 (CA DPR Chem Code) , 251 (CA DPR Chem Code) , Ansar 184 , Ansar 8100 , Ansar DSMA Liquid , Arrhenal , Arsinyl , Arsonic acid, methyl-, disodium salt , Arsonic acid, methyl-, disodium salt, hexahydrate , Arsonic acid, methyl-, disodium salt, hexahydrate CAS 5967-62-4 (Stable form in moist air) , Calar-E-rad , Chipco Crab Kleen , Crab-E-Rad , Dal-E-Rad 100 , Di-Tac , Diarsen , Dinate , Disodium Methanearsenate , Disodium methanearsonate , Disodium methylarsonate , Disodium methylarsonate (DSMA) , Disodium monomethylarsonate , DMA , Drexel DSMA Liquid , DSMA , DSMA , DSMA(Disodiun methanearsonate) , Jon-Trol , MAA, disodium salt , Methanearsonic acid, disodium salt , Methar , Metharsan , Metharsinat , Methylarsonic acid, disodium salt , Namate , Sodar , Versar DSMA-LQ , Weed-E-Rad
 
Products Containing This Chemical
Current and historic U.S. registered products
View U.S. Products All Products Currently Registered Products
 

Signs and Symptoms of DSMA Poisoning

NOTE! There may be other diseases and chemicals that have similar symptoms.

If you have a poisoning emergency in the United States call 1-800-222-1222.
If the victim has collapsed or is unconscious, call 911.

DSMA is a Arsenical compound.

Report a Poisoning

Symptoms of Poisoning with Arsenical Compounds
Find Products Containing this Chemical

- Garlic odor of breath and feces, metallic taste in mouth.
- Adverse GI effects predominate with vomiting, abdominal pain and rice-water or bloody diarrhea. GI effects may also include inflammation, vesicle formation and eventual sloughing of the mucosa in the mouth, pharynx and esophagus.
- Central nervous system effects are common: headache, dizziness, drowsiness and confusion.
- Symptoms may progress to include muscle weakness and spasms, hypothermia, lethargy, delirium, coma and convulsions.
- Renal injury is manifest as proteinuria, hematuria, glycosuria, oliguria, casts in the urine and in severe poisoning cases, acute tubular necrosis.
- Cardiovascular effects include shock, cyanosis and cardiac arrhythmia.
- Liver damage may be manifested by elevated liver enzymes and jaundice.
- Injury to blood-forming tissues may cause anemia, leucopenia and thrombocytopenia.
Chronic exposure may lead to:
- Muscle weakness, fatigue, anorexia, weight loss.
- Hyperpigmentation, hyperkeratosis.
- Peripheral neuropathy, paresthesia, paresis and ataxia.
- Inability to coordinate voluntary muscular movements.
- Subcutaneous edema in face, eyelids, and ankles.
- Stomatitis, white striations across the nails (Mees lines) and sometimes loss of nails or hair.
- Liver toxicity as indicated by hepatomegaly, jaundice, cirrhosis.
- Renal toxicity leading to oliguria, proteinuria, and hematuria.
- EKG abnormalities and peripheral vascular disease.
- Hematologic abnormalities.
- Cancer.

Source for Group Symptoms: Recognition and Management of Pesticide Poisoning, 5th edition, U.S. EPA, Chapter 14.

Treatment for Arsenical Poisoning

See: Recognition and Management of Pesticide Poisoning, 5th edition, U.S. EPA, Chapter 14, page 129.

 
 

Toxicity Information for DSMA

  Note: Information for many chemicals is incomplete and may not be fully representative of effects on humans. Why?

Summary Toxicity Information

PAN Bad Actor
Chemical
1
Acute
Toxicity
2
Carcinogen Cholinesterase
Inhibitor
Ground
Water Contaminant
Developmental or
Reproductive Toxin
Endocrine
Disruptor
No Potential
 
Indicates high toxicity in the given toxicological category. Indicates no available weight-of-the-evidence summary assessment. For additional information on toxicity from scientific journals or registration documents, see the "Additional Resources for Toxicity " section of the chemical detail page.
1. PAN Bad Actors are chemicals that are one or more of the following: highly acutely toxic, cholinesterase inhibitor, known/probable carcinogen, known groundwater pollutant or known reproductive or developmental toxicant. NOTE! Because there are no authoritative lists of Endocrine Disrupting (ED) chemicals, EDs are not yet considered PAN Bad Actor chemicals.
2. The acute toxicity reported on this page is of the pure chemical ingredient only and may not reflect the acute toxicity of individual pesticide products. To view acute toxicity of individual products, click on 'View Products' link in the 'Chemical Identification' section above.

Additional Resources about the Toxicity of this Chemical

See the Global Pesticide Resources page for many additional links.

Detailed Toxicity Information

This Chemical
Parent Chemical 
Acute Toxicity 2
DSMA Cacodylic acid
WHO Acute Hazard
TRI Acute Hazard
Material Safety Data Sheets
Acute rating from U.S. EPA product label
U.S. NTP Acute Toxicity Studies
      View Studies
Cholinesterase Inhibitor
Not Listed
Not Listed
Not Available
No Consensus Value
No NTP Studies

No
III, Slightly Hazardous
Not Listed
Not Available
No Consensus Value
No NTP Studies

No
2. The acute toxicity reported on this page is of the pure chemical ingredient only and may not reflect the acute toxicity of individual pesticide products. To view acute toxicity of individual products, click on 'View Products' link in the 'Chemical Identification' section above.
 
Cancer Information
DSMA Cacodylic acid
IARC Carcinogens
U.S. NTP Carcinogens
California Prop 65 Known Carcinogens
U.S. EPA Carcinogens
TRI Carcinogen
1, Known
Not Listed
Not Listed
Not Likely
Not Listed
1, Known
Not Listed
Yes
B2, Probable
Not Listed
 
Endocrine Disruption
DSMA Cacodylic acid
Illinois EPA list
Keith list
Colborn list
Benbrook list
Danish Inert list
EU list
Not Listed
Not Listed
Not Listed
Not Listed
Not Listed
Not Listed
Not Listed
Not Listed
Not Listed
Not Listed
Not Listed
Not Listed
 
Reproductive and Developmental Toxicity
DSMA Cacodylic acid
CA Prop 65 Developmental Toxin
U.S. TRI Developmental Toxin
CA Prop 65 Female Reproductive Toxin
CA Prop 65 Male Reproductive Toxin
U.S. TRI Reproductive Toxin
Not Listed
Not Listed
Not Listed
Not Listed
Not Listed
Not Listed
Not Listed
Not Listed
Not Listed
Not Listed
 
Chemicals of Special Concern
DSMA Cacodylic acid
PAN Bad Actors
PAN Dirty Dozen list
Yes
Not Listed
Yes
Not Listed
 

Water Pollution Potential and Criteria for DSMA

Water Pollution Potential

This Chemical
Parent Chemical
  DSMA Cacodylic acid
PAN Ground Water Contaminant Rating Potential Potential
 
Physical Property Data Related to Water Contamination Potential
Water Solubility (Avg, mg/L)
Adsorption Coefficient (Koc)
Hydrolysis Half-life (Avg, Days)
Aerobic Soil Half-life (Avg, Days)
Anaerobic Soil Half-life (Avg, Days)
1,040,000
1,680
35.0
269.0
-
 
 

Sorry, no water quality standards or criteria have been established for this chemical by the U.S. or Canadian governments; however, there may be criteria established for related chemicals.

 

Regulatory Information for DSMA

International Regulatory Status

This Chemical
Parent Chemical 
Registration in Selected Countries Registration in Selected Countries:
DSMA

Registration for Selected Countries:
Cacodylic acid

 
UNEP Persistent Organic Pollutant (POP)
UNEP Prior Informed Consent Chemical (PIC)
WHO Obsolete Pesticide
Not Listed
Not Listed
Not Listed
Not Listed
Not Listed
Not Listed
 

U.S. and California Regulatory Status

U.S. EPA Registered
U.S. EPA Hazardous Air Pollutant
U.S. EPA Minimum Risk Pesticide (25b list)

CA Registered
CA Groundwater Contaminant
CA Toxic Air Contaminant
No
Not Listed
No

No
Not Listed
Not Listed
No
Not Listed
No

No
Not Listed
Not Listed
 

Maximum Tolerance and Residue Levels

Codex Alimentarius
   (UN FAO Maximum Residue Limits)
U.S. Maximum Tolerance Levels
European Union Maximum Residue Levels
Go to web site

Go to web site

Go to web site
 

Ecotoxicity for DSMA

Note! Information for many chemicals is incomplete and may not be fully representative of effects on the environment. Why? Click on underlined terms for definitions and additional information.

Aquatic Ecotoxicity

All Toxic Effects for Organism Group
Organism Group Effects Noted
Amphibians Mortality
AquaticPlants Population
Fish Mortality
Insects Accumulation, Mortality
Molluscs Accumulation, Mortality
Phytoplankton Population
Zooplankton Intoxication, Mortality, Reproduction
~ Un-Assigned Mortality, Population
View All Aquatic Ecotoxicity Studies and References
 
Summary of Acute Toxicity for Organism Group
Organism Group Average Acute Toxicity Acute Toxicity Range
Amphibians Not Acutely Toxic Not Acutely Toxic
Fish Slightly Toxic Not Acutely Toxic to Slightly Toxic
Zooplankton Slightly Toxic Slight Toxicity
View All Acute Summaries
 

Terrestrial Ecotoxicity

Summary of Acute Toxicity for Organism Group
Organism Group Average Acute Toxicity Acute Toxicity Range
HoneybeesNot AcutelyT ToxicNot AcutelyT to Slightly Toxic
Note: Population-level effects on honeybees may occur even if a pesticide has low acute toxicity. For example, certain pesticides interfere with honeybee reproduction, ability to navigate, or temperature regulation, any of which can have an effect on long-term survival of honeybee colonies. The neonicotinoids, pyrethroids and keto-enol pesticides are some types of pesticides causing one or more of these effects.
Honeybee Chronic Toxicity

Sorry, no honeybee chronic toxicity data available for this chemical. Try related chemicals.

Related Chemicals for DSMA

CAS Number Relation Reason Chemical Name Chem Detail Registration Symptoms California Use Chem Use Type U.S. EPA Reg PAN Bad Actor
75-60-5 Parent P Cacodylic acid View View View View Herbicide, Defoliant No Yes
5902-95-4 Related 3 Calcium acid methanearsonate View View View View Herbicide, Defoliant No Yes
6423-72-9 Related 3 Calcium methanearsonate View View View View Herbicide, Defoliant No Yes
126-94-3 Related 3 Calcium propanearsonate View View View View Herbicide, Defoliant No Yes
53404-47-0 Related 3 Dodecyl ammonium methanearsonate View View View View Herbicide, Defoliant No Yes
144-21-8 Related 3 DSMA View View View View Herbicide, Defoliant No Yes
124-58-3 Related 3 Methane arsonic acid (MAA) View View View View Herbicide No Yes
2321-53-1 Related 3 Monoammonium methanearsonate View View View View Herbicide, Defoliant No Yes
2163-80-6 Related 3 MSMA View View View View Herbicide, Defoliant Yes Yes
6379-37-9 Related 3 Octylammonium methanearsonate View View View View Herbicide, Defoliant No Yes
124-65-2 Related 3 Sodium cacodylate View View View View Herbicide, Defoliant, Rodenticide No Yes
69484-14-6 Related 3 Triethanolamine cacodylate View View View View Herbicide, Defoliant No Yes
5902-97-6 Related 3 Triethanolamine methanearsonate View View View View Herbicide, Defoliant No Yes
 
Working with the Information on this Page

Click on underlined terms for definitions or go to the Pesticide Tutorial overview page.

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* Data marked with an asterisk indicates that this chemical is not explicitly listed on the corresponding list. Instead, it belongs to a group of chemicals that IS designated on the list. For example, if an agency assigns a classification of reproductive toxicant to "mercury compounds", that classification is applied to all mercury compounds in the PAN Pesticide database, which are then marked with an asterisk.

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