- Naphthalene, methyl-
- Dycar MN
- Sure-Sol 187
- Tetrosin MNLF
Bluish-brown oil or a clear yellow liquid. Coal tar or mothball odor.
Chemical intermediate for methylnaphthalenesulfonate surfactants, naphthalenecarboxylic acids.
Registry Numbers and Inventories.
Japan ENCS (MITI)
Melting point, °C
-22 (1-methyl) and 34.6 (2-methyl)
Boiling point, °C
Vapor pressure, mmHg
1.01 g/cm3 (20 C)
Solubility in water
Partition coefficient, pKow
Hazards and Protection.
Keep away from heat and flame. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep containers tightly closed.
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Wear appropriate protective gloves, clothing and goggles.
Wear a NIOSH-approved half face respirator equipped with an organic vapor/acid gas cartridge (specific for organic vapors, HCl, acid gas and SO2) with a dust/mist filter.
If you spill this chemical, FIRST REMOVE ALL SOURCES OF IGNITION. Then, use absorbent paper to pick up all liquid spill material. Your contaminated clothing and absorbent paper should be sealed in a vapor-tight plastic bag for eventual disposal. Solvent wash all contaminated surfaces with 60-70% ethanol followed by washing with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned.
Incompatible with strong oxidizing agents Incompatible with peroxides and oxygen.
Fires involving this material can be controlled with a dry chemical, carbon dioxide or Halon extinguisher. A water spray may also be used.
This chemical is probably combustible.
Containers may explode when heated.
Fire may produce irritating, corrosive and/or toxic gases.
Hemolytic anemia has developed in neonates following in utero exposure. In utero exposure causes cataracts in rats.
Nausea, vomiting, abdominal pain, diarrhea, and anorexia may occur up to 48 hours following acute ingestion. Nausea may also occur after inhalation exposure.
Respiratory distress, respiratory failure, and pulmonary edema have been infrequently reported.
Erythema and dermatitis are hypersensitivity reactions. One case of exfoliative contact dermatitis has been reported. Anemia may result in pallor.
Facial flushing may occur. Ocular effects from chronic exposure include optic neuritis, lens opacities, and chorioretinitis. Naphthalene is an eye irritant. The vapor causes eye irritation at airborne concentrations of 15 ppm. Eye contact with the solid material may result in inflammation of the eye, superficial injury to the cornea, diminished visual acuity, and other effects. It may cause cataracts.
DO NOT INDUCE VOMITING. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. Be prepared to transport the victim to a hospital if advised by a physician.
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.
IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.
First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.