2-Methylnaphthalene Safety Data Sheets

Acute toxicity - Category 4, Oral

Hazardous to the aquatic environment, long-term (Chronic) - Category Chronic 2

If inhaled

Following skin contact

Following eye contact

Following ingestion

SYMPTOMS: Symptoms of exposure to this compound may include irritation of the skin, eyes, mucous membranes and upper respiratory tract. It may also cause headaches, nausea, vomiting, diarrhea, anemia, jaundice, euphoria, dermatitis, visual disturbances, convulsions and comatose. ACUTE/CHRONIC HAZARDS: This compound may be harmful by inhalation, ingestion or skin absorption. It is an irritant of the skin, eyes, mucous membranes and upper respiratory tract. When heated to decomposition it emits acrid smoke, irritating fumes and toxic fumes of carbon monoxide and carbon dioxide. (NTP, 1992)

This chemical is combustible. (NTP, 1992)

Use powder, foam, carbon dioxide.

Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations. Do NOT let this chemical enter the environment.

Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations. Do NOT let this chemical enter the environment.

Accidental Release Measures. Personal precautions, protective equipment and emergency procedures: Use personal protective equipment. Avoid dust formation. Avoid breathing vapours, mist or gas. Ensure adequate ventilation. Evacuate personnel to safe areas. Avoid breathing dust. Environmental precautions: Prevent further leakage or spillage if safe to do so. Do not let product enter drains. Discharge into the environment must be avoided. Methods and materials for containment and cleaning up: Pick up and arrange disposal without creating dust. Sweep up and shovel. Keep in suitable, closed containers for disposal.

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.

Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing.Conditions for safe storage, including any incompatibilities: Keep container tightly closed in a dry and well-ventilated place.

Occupational Exposure limit values

Biological limit values

Eye/face protection

Skin protection

Respiratory protection

Thermal hazards

Decomposes on heating. This produces acrid smoke and irritating fumes.

no data available

Combustible.2-METHYLNAPHTHALENE is incompatible with strong oxidizing agents. It is also incompatible with peroxides and oxygen. (NTP, 1992)

no data available

It... is incompatible with strong oxidizing agents.

Decomposes on heating. This produces acrid smoke and irritating fumes.

Acute toxicity

• Oral: LD50 Rat oral 1630 mg/kg
• Inhalation: no data available
• 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: no data available
• Toxicity to daphnia and other aquatic invertebrates: EC50; Species: Daphnia magna (Water flea) age 4-6 days, length 1.5 mm; Conditions: freshwater, static, 23 deg C, pH 6-7, dissolved oxygen 5-9 mg/L; Concentration: 13 mmol/cu m (95% confidence interval: 5-35 mmol/cu m); Effect: intoxication, immobilization /> or = 97% purity
• Toxicity to algae: no data available
• Toxicity to microorganisms: no data available

AEROBIC: Aerobic aqueous screening test data showed a 84 and 95% loss of 0.1 ppm 2-methylnaphthalene in 1 and 5.6 days, respectively, for acclimated sewage inoculum and did not degrade with unacclimated sewage(1). When marine water was used to inoculate, 2-methylnaphthalene at a concentration of 0.067 ppm disappeared within 10 days under aerobic conditions at 25 deg C(2). Using the Japanese MITI I procedure, <5% degradation of 2-methylnaphthalene occurred in 28 days; however, for the MITI II test with a freshwater inoculum, 72% was lost in 28 days under aerobic conditions at 25 deg C(3). 2-Naphthoic acid was identified as a microbial co-oxidation product of 2-methylnaphthalene by mixed cultures of Norcardia sp. isolated from soil(4). 2-Methylnaphthalene showed a lag-period of two weeks, and then rapid degraded to 17% residual in the two weeks following the lag period and was not detected after 25 weeks, in a study using microcosms filled with soil (1.1% organic carbon, 6.5% kaolin) material and a coal derived wood-preservative(5). 2-Methylnaphthalene was aerobically biodegraded 100% in 4 different northern soils (arctic diesel fuel contaminated, PCB and associated oil contaminated, creosote-PAH contaminated, uncontaminated) incubated at 7 and 20 deg C for 90 days(6).

After 2, 3 and 5 weeks exposure, the BCF of 2-methylnaphthalene in the muscle tissue of Coho salmon (Onchorhynchus kisutch) was 30, 100 and 190, respectively. The BCF dropped to 70 within one week following 6 weeks exposure(1). After 2 weeks exposure, the average BCF of 2-methylnaphthalene in the muscle tissue of Starry flounder (Platichthys stellatus) was 895(1). BCF values in sheepshead minnows (Cyprinidon variegatus) exposed for 36 days to 2.46 and 23.63 ug/L of 2-methylnaphthalene were 2852 and 2921, respectively(2). Exposure of fingerling rainbow trout to 14C-(8)-2-methylnaphthalene (2573 dpm/ug) at 0.02 mg/L for four weeks in a continuous- flow delivery system resulted in maximum tissue levels from 40 to 300 times the water concentration; maximum bile 14C levels were 23,500 times the water concentration(3). A BCF of 407 has been reported for bluegill sunfish after exposure to 14C-(8)-2-methylnaphthalene at 0.013 ug/L for 26 days in a continuous-flow delivery system(4). According to a classification scheme(5), these BCF values suggest that 2-methylnaphthalene bioconcentration in aquatic organisms is low to very high(SRC), provided the compound is not metabolized by the organism(SRC). A BCF of 8.1 was reported for 2-methylnaphthalene in clams after 24 hours of exposure to a water concentration of 2-methylnaphthalene of 480 ug/L(6). The biota-sediment accumulation factor for 2-methylnaphthalene determined using oligochaete worm (Lumbriculus variegatus) was 4.2 and 0.11 in Lake Erie sediment from Vermilion, OH and Dunkirk, NY, respectively(7).

A log Koc value of 3.67 was reported in soil(1). An average sediment- or soil-water partition coefficient (log Kp) for 2-methylnaphthalene of 2.00 was determined from 17 measurements(2). The log Koc values for 2-methylnaphthalene in 75 sediment samples was 3.00-5.96(3). Measured Koc values have been reported as 4,400(4) and 8,500(5) for 2-methylnaphthalene. According to a classification scheme(6), these Koc values suggest that 2-methylnaphthalene is expected to have slight to no mobility in soil.

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

Insufficient data are available on the effect of this substance on human health, therefore utmost care must be taken.