Mercaptodimethur
Product identifier
- Product name: Mercaptodimethur
- CBnumber: CB1254073
- CAS: 2032-65-7
- EINECS Number: 217-991-2
- Synonyms: methiocarb,methiocarbe
Relevant identified uses of the substance or mixture and uses advised against
- Relevant identified uses: For R&D use only. Not for medicinal, household or other use.
- Uses advised against: none
Company Identification
- Company: Chemicalbook
- Address: Building 1, Huihuang International, Shangdi 10th Street, Haidian District, Beijing
- Telephone: 400-158-6606
Classification of the substance or mixture
Acute toxicity - Category 3, Oral
Hazardous to the aquatic environment, short-term (Acute) - Category Acute 1
Hazardous to the aquatic environment, long-term (Chronic) - Category Chronic 1
Label elements
Pictogram(s)
- Signal wordDanger
H300 Fatal if swallowed
H410 Very toxic to aquatic life with long lasting effects
P264 Wash hands thoroughly after handling.
P264 Wash skin thouroughly after handling.
P273 Avoid release to the environment.
P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.
P501 Dispose of contents/container to..…
P264 Wash ... thoroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P273 Avoid release to the environment.
P301+P316 IF SWALLOWED: Get emergency medical help immediately.
P321 Specific treatment (see ... on this label).
P330 Rinse mouth.
P391 Collect spillage.
P405 Store locked up.
P501 Dispose of contents/container to an appropriate treatment and disposal facility in accordance with applicable laws and regulations, and product characteristics at time of disposal.
Other hazards
no data available
Substance
- Product name: Mercaptodimethur
- Synonyms: methiocarb,methiocarbe
- CAS: 2032-65-7
- EC number: 217-991-2
- MF: C11H15NO2S
- MW: 225.31
Description of first aid measures
If inhaledFresh air, rest. Refer for medical attention.
Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer immediately for medical attention.
Rinse with plenty of water (remove contact lenses if easily possible).
Rinse mouth. Refer immediately for medical attention.
Most important symptoms and effects, both acute and delayed
As a carbamate insecticide, this compound is a reversible cholinesterase inhibitor and acts on the nervous system. It is classified as very toxic, and the probable oral lethal dose for humans is 50-500 mg/kg or between 1 teaspoon and 1 ounce for a 150 lb. adult. (EPA, 1998)
Indication of any immediate medical attention and special treatment needed
Basic treatment: Establish a patent airway. Suction if necessary. Aggressive airway management may be needed. Watch for signs of respiratory insufficiency and assist ventilations if necessary. Administer oxygen by nonrebreather mask at 10 to 15 L/min. Monitor for shock and treat if necessary. Monitor for pulmonary edema and treat if necessary. Anticipate seizures and treat if necessary. For eye contamination, flush eyes immediately with water. Irrigate each eye continuously with normal saline during transport. Do not use emetics. For ingestion, rinse mouth and administer 5 ml/kg up to 200 ml of water for dilution and if the patient can swallow, has a strong gag reflex, and does not drool. Administer activated charcoal . Carbamates and related compounds
Extinguishing media
Wear goggles, self-contained breathing apparatus & rubber overclothing (incl gloves).
Specific Hazards Arising from the Chemical
When heated to decomposition, it emits very toxic fumes of nitrogen and sulfur oxides. (EPA, 1998)
Advice for firefighters
In case of fire in the surroundings, use appropriate extinguishing media.
NFPA 704
| HEALTH | 4 | Very short exposure could cause death or major residual injury (e.g. hydrogen cyanide, phosgene, methyl isocyanate, hydrofluoric acid) | |
| FIRE | 0 | Materials that will not burn under typical fire conditions, including intrinsically noncombustible materials such as concrete, stone, and sand. Materials that will not burn in air when exposed to a temperature of 820 °C (1,500 °F) for a period of 5 minutes.(e.g. Carbon tetrachloride) | |
| REACT | 0 | Normally stable, even under fire exposure conditions, and is not reactive with water (e.g. helium,N2) | |
| SPEC. HAZ. |
Personal precautions, protective equipment and emergency procedures
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Sweep spilled substance into sealable containers. If appropriate, moisten first to prevent dusting. Then store and dispose of according to local regulations.
Environmental precautions
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Sweep spilled substance into sealable containers. If appropriate, moisten first to prevent dusting. Then store and dispose of according to local regulations.
Methods and materials for containment and cleaning up
A system for removing pesticides from the wash water produced by pesticide applicators as they clean their equipment has been developed. The first step is the flocculation/coagulation and sedimentation of the pesticide-contaminated wash water. The supernatant from the first step is then passed through activated carbon columns. Pesticides
Precautions for safe handling
NO open flames. Prevent deposition of dust. Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.
Conditions for safe storage, including any incompatibilities
Separated from food and feedstuffs. Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing.
Control parameters
Occupational Exposure limit valuesno data available
no data available
Exposure controls
Ensure adequate ventilation. Handle in accordance with good industrial hygiene and safety practice. Set up emergency exits and the risk-elimination area.
Individual protection measures
Eye/face protectionWear face shield.
Protective clothing. Protective gloves.
Avoid inhalation of dust.
no data available
Information on basic physicochemical properties
- Physical stateCrystalline Solid
- ColourWhite
- Odour
Phenol-like odor
- Melting point/freezing point
119°C
- Boiling point or initial boiling point and boiling range
310.7°C at 760 mmHg
- Flammability
Combustible.
- Lower and upper explosion limit/flammability limit
no data available
- Flash point
141.7°C
- Auto-ignition temperature
no data available
- Decomposition temperature
no data available
- pH
no data available
- Kinematic viscosity
no data available
- Solubility
200 g/l in dichloromethane; 53 g/l in isopropanol; 33 g/l in toluene; 1.3 g/l in hexane
- Partition coefficient n-octanol/water
log Kow = 2.92
- Vapour pressure1.5 x 10-5 Pa (20 °C)
- Density and/or relative density
1.14 g/cm3
- Relative vapour density
no data available
- Particle characteristics
no data available
Reactivity
Decomposes on heating and on burning. On combustion, forms irritating and toxic fumes and gases of sulfur oxides including sulfur dioxide (see ICSC 0074).
Chemical stability
Unstable in highly alkaline media
Possibility of hazardous reactions
Nonflammable.MERCAPTODIMETHUR is a carbamate ester. Carbamates are chemically similar to, but more reactive than amides. Like amides they form polymers such as polyurethane resins. Carbamates are incompatible with strong acids and bases, and especially incompatible with strong reducing agents such as hydrides. Flammable gaseous hydrogen is produced by the combination of active metals or nitrides with carbamates. Strongly oxidizing acids, peroxides, and hydroperoxides are incompatible with carbamates.
Conditions to avoid
no data available
Incompatible materials
Unstable in highly alkaline media.
Hazardous decomposition products
When heated to decomposition it emits very toxic fumes of /nitrogen oxides & sulfur oxides/.
Acute toxicity
- Oral: LD50 Mouse oral 52-58 mg/kg
- Inhalation: LC50 Rat inhalation >0.322 mg/kg/4 hr from table
- Dermal: LD50 Rat percutaneous > 5000 mg/kg
Skin corrosion/irritation
no data available
Serious eye damage/irritation
no data available
Respiratory or skin sensitization
no data available
Germ cell mutagenicity
no data available
Carcinogenicity
Cancer Classification: Group D Not Classifiable as to Human Carcinogenicity
Reproductive toxicity
no data available
STOT-single exposure
Cholinesterase inhibition. The substance may cause effects on the nervous system. The effects may be delayed.
STOT-repeated exposure
Cholinesterase inhibition. See Acute Hazards/Symptoms.
Aspiration hazard
A harmful concentration of airborne particles can be reached quickly on spraying or when dispersed, especially if powdered.
Toxicity
- Toxicity to fish: LC50 Bluegill (warm water) acute 1.9 ppm
- Toxicity to daphnia and other aquatic invertebrates: no data available
- Toxicity to algae: no data available
- Toxicity to microorganisms: no data available
Persistence and degradability
The degradation of methiocarb in soil is reported to be rapid (although no quantitative rates were provided), yielding methylsulfinylphenol and methylsulfonylphenol as metabolites(1). The aerobic biodegradation half-life of methiocarb in soil was reported to range from 17 to 111 days, and the anaerobic half-life was reported as 64 days(2).
Bioaccumulative potential
An estimated BCF of 35 was calculated for methiocarb(SRC), using a log Kow of 2.92(1) and a regression-derived equation(2). According to a classification scheme(3), this BCF suggests the potential for bioconcentration in aquatic organisms is moderate(SRC).
Mobility in soil
The Koc of methiocarb is estimated as 920(SRC), using a measured log Kow of 2.92(1) and a regression-derived equation(2). According to a classification scheme(3), this estimated Koc value suggests that methiocarb is expected to have low mobility in soil(SRC).
Other adverse effects
no data available
Disposal methods
ProductThe material can be disposed of by removal to a licensed chemical destruction plant or by controlled incineration with flue gas scrubbing. Do not contaminate water, foodstuffs, feed or seed by storage or disposal. Do not discharge to sewer systems.
Containers can be triply rinsed (or equivalent) and offered for recycling or reconditioning. Alternatively, the packaging can be punctured to make it unusable for other purposes and then be disposed of in a sanitary landfill. Controlled incineration with flue gas scrubbing is possible for combustible packaging materials.
UN Number
ADR/RID: UN2811 (For reference only, please check.)
IMDG: UN2811 (For reference only, please check.)
IATA: UN2811 (For reference only, please check.)
UN Proper Shipping Name
ADR/RID: TOXIC SOLID, ORGANIC, N.O.S. (For reference only, please check.)
IMDG: TOXIC SOLID, ORGANIC, N.O.S. (For reference only, please check.)
IATA: TOXIC SOLID, ORGANIC, N.O.S. (For reference only, please check.)
Transport hazard class(es)
ADR/RID: 6.1 (For reference only, please check.)
IMDG: 6.1 (For reference only, please check.)
IATA: 6.1 (For reference only, please check.)
Packing group, if applicable
ADR/RID: I (For reference only, please check.)
IMDG: I (For reference only, please check.)
IATA: I (For reference only, please check.)
Environmental hazards
ADR/RID: Yes
IMDG: Yes
IATA: Yes
Special precautions for user
no data available
Transport in bulk according to IMO instruments
no data available
Safety, health and environmental regulations specific for the product in question
European Inventory of Existing Commercial Chemical Substances (EINECS)Abbreviations and acronyms
- CAS: Chemical Abstracts Service
- ADR: European Agreement concerning the International Carriage of Dangerous Goods by Road
- RID: Regulation concerning the International Carriage of Dangerous Goods by Rail
- IMDG: International Maritime Dangerous Goods
- IATA: International Air Transportation Association
- TWA: Time Weighted Average
- STEL: Short term exposure limit
- LC50: Lethal Concentration 50%
- LD50: Lethal Dose 50%
- EC50: Effective Concentration 50%
References
- IPCS - The International Chemical Safety Cards (ICSC), website: http://www.ilo.org/dyn/icsc/showcard.home
- HSDB - Hazardous Substances Data Bank, website: https://toxnet.nlm.nih.gov/newtoxnet/hsdb.htm
- IARC - International Agency for Research on Cancer, website: http://www.iarc.fr/
- eChemPortal - The Global Portal to Information on Chemical Substances by OECD, website: http://www.echemportal.org/echemportal/index?pageID=0&request_locale=en
- CAMEO Chemicals, website: http://cameochemicals.noaa.gov/search/simple
- ChemIDplus, website: http://chem.sis.nlm.nih.gov/chemidplus/chemidlite.jsp
- ERG - Emergency Response Guidebook by U.S. Department of Transportation, website: http://www.phmsa.dot.gov/hazmat/library/erg
- Germany GESTIS-database on hazard substance, website: http://www.dguv.de/ifa/gestis/gestis-stoffdatenbank/index-2.jsp
- ECHA - European Chemicals Agency, website: https://echa.europa.eu/
Other Information
Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available.
The information in this MSDS is only applicable to the specified product, unless otherwise specified, it is not applicable to the mixture of this product and other substances. This MSDS only provides information on the safety of the product for those who have received the appropriate professional training for the user of the product. Users of this MSDS must make independent judgments on the applicability of this SDS. The authors of this MSDS will not be held responsible for any harm caused by the use of this MSDS.