Dimethylformocarbothialdine Safety Data Sheets

Acute toxicity - Category 4, Oral

Eye irritation, Category 2

Hazardous to the aquatic environment, short-term (Acute) - Category Acute 1

Hazardous to the aquatic environment, long-term (Chronic) - Category Chronic 1

If inhaled

Following skin contact

Following eye contact

Following ingestion

SYMPTOMS: This compound is a LACHRYMATOR. Symptoms of exposure to this compound include irritation of the skin and eyes. It also causes sensitization of the skin. Irritation of the nose and mouth may occur. ACUTE/CHRONIC HAZARDS: This compound is a LACHRYMATOR. It is toxic by ingestion and inhalation. It is a severe eye irritant and mild primary skin irritant IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used; if not available, use a level of protection greater than or equal to that advised under Protective Clothing. (NTP, 1992)

Flash point data for this chemical are not available; however, it is probably combustible. (NTP, 1992)

Use water spray, powder, foam, carbon dioxide.

Do NOT wash away into sewer. Sweep spilled substance into covered containers. Carefully collect remainder. Then store and dispose of according to local regulations.

Do NOT wash away into sewer. Sweep spilled substance into covered containers. Carefully collect remainder. Then store and dispose of according to local regulations.

Do NOT wash away into sewer. Sweep spilled substance into containers. Carefully collect remainder, then remove to safe place.

NO open flames. 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.

Provision to contain effluent from fire extinguishing. Separated from acids and food and feedstuffs. Cool. Dry. Keep in a well-ventilated room.Store in cool, dry place out of children's reach.

Occupational Exposure limit values

Biological limit values

Eye/face protection

Skin protection

Respiratory protection

Thermal hazards

Decomposes above 102°C . This produces toxic fumes including nitrogen oxides and sulfur oxides. Decomposes on contact with acids. This produces carbon disulfide. Decomposes on contact with water or moisture. This produces toxic gases.

Stable at temperatures up to 35 deg C. Sensitive to temperatures >50 deg C, & to moisture. Hydrolysed in acidic media to carbon disulfide, formaldehyde, & methylamine.

DAZOMET decomposes in water, dilute acids and alcohol. (NTP, 1992)

no data available

no data available

When heated to decomposition it emits very toxic fumes of /nitrogen oxides & sulfur oxides/.

Acute toxicity

• Oral: LD50 Mouse, male albino acute oral 650 mg/kg
• Inhalation: LC50 Rat inhalation 8400 mg/cu m/4 hr
• Dermal: no data available

Skin corrosion/irritation

Serious eye damage/irritation

Respiratory or skin sensitization

Germ cell mutagenicity

Carcinogenicity

Reproductive toxicity

STOT-single exposure

STOT-repeated exposure

Aspiration hazard

• Toxicity to fish: LC50; Species: Lepomis macrochirus (Bluegill, 35 mm standard length); Conditions: freshwater, static, 21 deg C, pH 7.1-7.4, dissolved oxygen 3.5-8.8; Concentration: >32000 ug/L for 24 or 48 hr /100% purity
• Toxicity to daphnia and other aquatic invertebrates: EC50; Species: Daphnia magna (Water flea, age <24 hr); Conditions: freshwater, flow through; Concentration: 11900 ug/L for 48 hr (95% confidence interval: 9500-14800 ug/L); Effect: intoxication, immobilization /99% purity
• Toxicity to algae: EC50; Species: Pseudokirchneriella subcapitata (Green algae); Conditions: freshwater, static; Concentration: 114 ug/L for 5 days (95% confidence interval: 100-130 ug/L); Effect: population abundance /98.6% purity
• Toxicity to microorganisms: no data available

AEROBIC: Dazomet, present at 100 mg/L, reached 4% of its theoretical BOD in 4 weeks using an activated sludge inoculum at 30 mg/L in the Japanese MITI test(1). The rate of disappearance of dazomet from both an unamended and sterilized Williamson silt loam was identical, indicating that the initial phase of degradation in soil occurred predominantly from nonenzymatic mechanisms(2). The rate of degradation of dazomet in soil, as measured by the release of methyl isothiocyanate, was found to be independent of the soil microorganisms present(3).

An estimated BCF of 2.4 was calculated for dazomet(SRC), using a log Kow of 0.63(1) and a regression-derived equation(2). According to a classification scheme(3), this BCF suggests the potential for bioconcentration in aquatic organisms is low(SRC). In addition, dazomet is rapidly hydrolyzed in both fresh and salt water(4) and is not expected to be present for sufficient periods of time for bioconcentration(SRC).

The Koc of dazomet is estimated as 52(SRC), using a log Kow of 0.63(1) and a regression-derived equation(2). According to a classification scheme(3), this estimated Koc value suggests that dazomet is expected to have high mobility in soil; however it is expected to hydrolyze(1) before extensive leaching occurs(SRC).

no data available

Product

Contaminated packaging

no data available

no data available

Information on revision

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

The technical grade is 98% pure; dazomet is moderately stable but is sensitive to temperature > 35°C and to moisture.If the substance is formulated with solvent(s) also consult the card(s) (ICSC) of the solvent(s).Carrier solvents used in commercial formulations may change physical and toxicological properties.