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Chemical Identification/RIDS Chemical Name: HYDROFLUORIC ACID Regulatory Name: HYDROFLUORIC ACID HYDROFLUORIC ACID (CONC. 50% OR GREATER) uvnRnr_GM Gi 1 inPIM7 NFPA Codes F: 0 NFPA Codes H: 4 NFPA Codes R: 1 NFPA Codes S: Formula: HF (aqueous) DOT: CORROSIVE, POISON UN Num: 1790 Sec 112R: CAATQ: 1000 313: E EHS: EHSTPQ: 100 RCRA: U134 CERCLA: RQ: 100 CHRIS: HFA CAS: 7664-39-3 STCC: 4930022 General Description A colorless fuming mobile aqueous solution with a pungent odor. Density 9.6 Ib / gal. Corrosive to metals and tissue. Highly toxic by ingestion and inhalation. Exposure to fumes or very short contact with liquid may cause severe painful burns; penetrates skin to cause deep-seated ulceration that may lead to gangrene. (NOAA, 2003) Fire Hazard Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Vapors may accumulate in confined areas (basement, tanks, hopper/tank cars, etc.). Substance will react with water (some violently), releasing corrosive and/or toxic gases. Reaction with water may generate much heat which will increase the concentration of fumes in the air. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water. (DOT, 2000) Fire Fighting Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Use water in flooding quantities as fog. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. (REACTIVITY, 2003) Protective Clothing Skin: If chemical is in liquid form, wear appropriate personal protective clothing to prevent skin contact. Eyes: If chemical is in liquid form, wear appropriate eye protection to prevent eye contact Wash skin: If the chemical is in liquid form, the worker should immediately wash the skin when it becomes contaminated. Remove: If chemical is in liquid form, work clothing that becomes wet or significantly contaminated should be removed and replaced Change: No recommendation is made specifying the need for the worker to change clothing after the work shift. Provide: Eyewash fountains should be provided (when chemical is in liquid form) in areas where there is any possibility that workers could be exposed to the substance; this is irrespective of the recommendation involving the wearing of eye protection. Facilities for quickly drenching the body should be provided (when chemical is in liquid form) within the immediate work area for emergency use where there is a possibility of exposure. [Note: It is intended that these facilities provide a sufficient quantity or flow of water to quickly remove the substance from any body areas likely to be exposed. The actual determination of what constitutes an adequate quick drench facility depends on the specific circumstances. In certain instances, a deluge shower should be readily available, whereas in others, the availabili of water from a sink or hose could be considered adequate.] (NIOSH, 2003) Dupont Average Standardized Breakthrough Times. Tychem® Responder® more than 480 min. Tychem® Reflector® more than 480 min. (Dupont, 2003) Non -Fire Response Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Use water spray to knock -down vapors. Neutralize spilled material with crushed limestone, soda ash, or lime. Vapor knockdown water is corrosive or toxic and should be diked for containment. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Dike surface flow using soil, sand bags, foamed polyurethane, or foamed concrete. Absorb bulk liquid with fly ash or cement powder. Neutralize with agricultural lime (CaC crushed limestone (CaCO3) or sodium bicarbonate (NaHCO3). Water spill: Neutralize with agricultural lime (CaO), crushed limestone (CaCO3), or sodium bicarbonate (NaHCO3). Add soda ash (Na2CO3). Adjust pH to neutral (pH=7). Use mechanical dredges or lifts to remove immobilized masses of pollutants and precipitates. (REACTIVITY, 2003) Health Hazard 6/12/2007 Printed from CAMEO Page 1