Skin contact with sulfur dioxide

Phosphoms(V) sulfide is a mild skin irritant and may cause dermatitis in sensitive individuals. The primary health ha2ard results from the Hberation of hydrogen sulfide after contact with moisture. Contact with moisture also forms phosphoric acid. A secondary ha2ard is the formation of sulfur dioxide when phosphoms(V) sulfide bums. The oral LD q of in rats is 389 mg/kg the OSHA standard time-weighted average (TWA) is 1 mg /m (33). 

SAFETY PROFILE A highly corrosive irritant to the eyes, skin, and mucous membranes. Mildly toxic by inhalation, Explosive reaction with alcohols + hydrogen cyanide, potassium permanganate, sodium (with aqueous HCl), tetraselenium tetranitride. Ignition on contact with aluminum-titanium alloys (with HCl vapor), fluorine, hexa-lithium disilicide, metal acetylides or carbides (e.g., cesium acetylide, rubidium ace-tylide). Violent reaction with 1,1-difluoro-ethylene. Vigorous reaction with aluminum, chlorine + dinitroanilines (evolves gas). Potentially dangerous reaction with sulfuric acid releases HCl gas. Adsorption of the acid onto silicon dioxide is exothermic. See also HYDROGEN CHLORIDE (AEROSOL) and HYDROCHLORIC ACID. 

Selenium and tellurium and their compounds produce very unpleasant and dangerous physiological reactions. They are hazardous both through inhalation as dusts and through skin absorption from solution. Because of these properties and because of the toxicity of the sulfur dioxide used as a solvent, the reactions should be conducted in an efficient fume hood. Rubber gloves and apron are recommended to prevent contact with solutions containing selenium and tellurium compounds as well as the dangerous pentafluorides of antimony and arsenic. 

Sodium melabisutfile (sodium pyrosutfile [CAS 7681-57-4]) Very irritating to eyes and skin upon direct contact. Dusts irritating to eyes and respiratory tract pulmonary edema may result. Hypersensitivity reactions may occur. 5 mg/m White powder or crystalline material with a slight odor of sulfur dioxide. Reacts to form sulfur dioxide in the presence of moisture. 

Thionyl chloride is a volatile and corros/Ve chemical that undergoes rapid reaction with water and atmospheric moisture to produce sulfur dioxide and hydrogen chloride, both of which are also corrosive. Wear latex gloves when handling this chemical and do not breathe it or allow it to come in contact with your skin. If contact occurs, immediately flood the affected area with cold water and then rinse with 5% sodium bicarbonate solution. Dispense thionyl chloride only at a hood and minimize its exposure to atmospheric moisture by keeping the bottle tightly closed when not in use. 

Handling, Storage, and Precautions thermally unstable and should be stored in dark at temperatures of —20° C or lower If It Is not to be used Immediately upon standing at room temperature It spontaneously disproportionates to form a mixture of disulfide and sulfonate as major product contact with skin may cause severe dermatitis also unstable towards bases yielding disulfide and sulfur dioxide. ... 

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