MSTFA

Precautionary statements

See Sections 8 and 11 for further details. Flammable Liquid ........................................................ Emergency Overview .......................................................

NFPA Ratings

Scale 0-4); Health = 2; Fire = 3; Reactivity = 1 W; Liquid: Clear, colorless to pale yellow with a mild, unpleasant odor Highly flammable and corrosive liquid and vapor. May cause flash fire. Keep away from ignition sources. Static electricity may accumulate and ignite vapors. Protect from static electricity. May be difficult to extinguish--re-ignition may occur. Reacts violently with water--contact with water or moist air may liberate hydrogen fluoride gas which in contact with metal can generate flammable/explosive hydrogen gas. The properties of this material have not been fully investigated. Use due caution in handling and use of this material. Vapor may be severely irritating to eyes, mucous membranes, and upper respiratory tract due to the possible formation of corrosive hydrofluoric acid when MSTFA reacts with the water in the human tissues. Harmful if inhaled or swallowed. Emits toxic fumes under fire conditions—potential chemical or thermal decomposition products: carbon monoxide, carbon dioxide, silicon oxides, nitrogen oxides, and hydrogen fluoride, hexamethyldisiloxane, trifluoroacetamide Standard chemical handling precautions: Avoid ingestion or breathing vapors or mists. Avoid contact with eyes, skin, and clothing. Wash thoroughly after handling. Target organs: eyes, skin, mucous membranes, respiratory system, immune system. See Sections 4, 5, 6, 8, 9, and 10. ...................................................................................................................................................

2.3 Other hazards

This compound has not fully been tested for toxicological, irritation, or similar tendencies.

Principle Routes of Exposure

Eye or Skin contact, Inhalation Corrosive hydrofluoric acid (strong acid) may be formed when MSTFA reacts with the water in the skin, eyes, and mucous membranes; Hydrofluoric acid is destructive to skin, eye, and mucous membranes. Eye: Can cause severe irritation and possible dryness. Severe conjunctivitis and corneal damage may be possible. Skin: Can cause moderate irritation and possible dryness. Prolonged or repeated skin contact may cause dermatitis with possible symptoms delayed for several hours. Prompt and through washing with soap and water will minimize or eliminate potential dermal effects. Inhalation: Can cause irritation to mucous membranes and upper respiratory system. May be harmful or fatal if inhaled in large quantities due to spasm, inflammation and edema of the larynx and bronchi, chemical pneumonitis and pulmonary edema. Ingestion: May cause irritation. May be harmful. Acute: See above route. Chronic: See above route. Decreased immune response has been reported in test animals. Target Organs: eyes, skin, mucous membranes, respiratory system, immune system. Pre-existing conditions that may be aggravated: respiratory, skin, or eye conditions. Symptoms: Results of overexposure may include irritation, burning sensation, coughing, wheezing, laryngitis, shortness of breath, headache, nausea, vomiting and/or dizziness and/or suffocation. See Section 11 for additional toxicological data.