Dichlorosilane

SECTION 2: Hazards identification

OSHA Physical state Gas. Odor : Irritating, Chocking, (Strong). Emergency overview DANGER! Toxic, flammable, corrosive, high pressure liquid & gas. May be fatal if inhaled. Causes eye, skin and respiratory tract burns. Water can cause violent reaction. Symptoms may be delayed. Self-contained breathing apparatus may be required by rescue workers. Contains gas under pressure. In a fire or if heated, a pressure increase will occur and the container may burst or explode. Harmful by inhalation. Do not puncture or incinerate container. Do not breathe gas. Avoid contact with eyes, skin and clothing. Use only with adequate ventilation. Keep container tightly closed and sealed until ready for use.

Principle Routes of Exposure

Inhalation

Potential Acute Health Effects

Inhalation Low vapour concentrations will iritate the nose, throat and chest, causing discomfort or pain with coughing, excess sputum, runny nose and difficulty with breathing. Higher concentrations may result in the inhalation of harmful and possibly lethal, amounts of materials. The nasal passages, larynx and lungs may be injured. Ingestion An unlikely route of exposure. This product is a gas at normal temperature and pressure.May cause burns of the mouth, oesophagus and stomach. There may be pain in the mouth, throat, chest,and abdomen and possible swelling of the tissues in the mouth and throat. Effects may include nausea, vomitting, diarrhea, dizziness, drowsiness, faintness, weakness, thirst, circulatory collapse, and loss of consciousness. Skin Brief contact will cause itching or discomfort, with the development of local redness and possibly swelling. Sustained contact will cause pain, local redness, ulceration and possible bleeding into the inflamed site. Prolonged or widespread skin contact may result in absorption or potentially harmful amounts of material. Eyes Vapor will cause discomfort or pain in the eye, with excess tear production and blinking and excess redness and possibly swelling of the conjunctiva. If high concentrations of hydrogen chloride are formed, then injury to the cornia may develop. Splashes of liquid in the eye will cause pain, excess tear production and blinking, and marked excess redness and swelling of the conjunctiva. Severe cornial injury may occur, which if not adequately treated, could permanently impair vision. Potential chronic health effects

Potential chronic health

Classified A4 (not classfiable for human or animal) by ACGIH, 3 (not classifiable for human) by IARC [Hydrogen chloride]. Prolonged or repeated exposure to hydrogen chloride vapour may discolour and erode the teeth, ulcerate the nasal mucosa, and cause nose and gums to bleed. Carcinogenicity : Not listed as carcinogen by OSHA, NTP or IARC. Mutagenicity : No known significant effects or critical hazards.

Teratogenic Effects

No known significant effects or critical hazards. Developmental effects : No known significant effects or critical hazards. Fertility effects : No known significant effects or critical hazards. Target organs : Contains material which may cause damage to the following organs: upper respiratory tract, skin, eyes. Over-exposure signs/symptoms Inhalation : No specific data. Ingestion : No specific data. Skin : No specific data. Eyes : No specific data. Medical conditions Inhalation may aggravate asthma and inflammatory or fibrotic pulmanary disease. aggravated by over- Because of its irritating properties, this material may aggravate an existing dermatitis. exposure See toxicological information (section 11)