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Other Classes -> Fluorides, Inorganic

Corrosives

Hexafluorophosphoric acid appears as a clear colorless aqueous solution containing 60 percent hydrogen hexafluorophosphate (HPF6) by mass. Density 1.65 g / cm3. Corrosive to metals and tissue.

65% solution: Colorless fuming liquid; [Hawley] 60% aqueous solution: Colorless liquid; [MSDSonline]

STABLE IN NEUTRAL AND ALKALINE SOLN /65% SOLN/

FUMING /HEXAHYDRATE/

Specific gravity: 1.81 /65% soln/

Hydrolyzes slowly when diluted with water to other fluorophosphoric acids and finally phosphoric acid.

Anhydrous chemical dissociates rapidly into PF5 and HF at 25 °C.

In concentrated solutions, an equilibrium is established with its hydrolysis products in relatively low concentration.

Hydrolysis product of hexafluorophosphoric acid. mp. ca 31.5 °C. /Hexahydrate/

Danger

H314 (100%): Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]

P260, P264, P271, P280, P284, P301+P330+P331, P302+P361+P354, P304+P340, P305+P354+P338, P316, P320, P321, P363, P403+P233, P405, and P501 (click each P-code to see the statement)

Aggregated GHS information provided per 46 reports by companies from 5 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Phosphate(1-), hexafluoro-, hydrogen: Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right.

The New Jersey Worker and Community Right to Know Act requires public and private employers to provide information about hazardous substances at their workplaces. (N.J.S.A. 34:5A-1 et. seq.)

Excerpt from ERG Guide 154 [Substances - Toxic and/or Corrosive (Non-Combustible)]:

· Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.

Excerpt from ERG Guide 154 [Substances - Toxic and/or Corrosive (Non-Combustible)]:

· TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury or death.

MARTIN EE; DEVELOPMENT DOCUMENT FOR EFFLUENT LIMITATIONS GUIDELINES AND NEW SOURCE PERFORMANCE STANDARDS FOR PHOSPHORUS DERIVED CHEMICALS SEGMENT OF THE PHOSPHATE MANUFACTURING POINT SOURCE CATEGORY; US NTIS, PB REP: 158 PAGES (1974) ISS 241018. A STUDY WAS MADE OF THE PHOSPHATE MANUFACTURING POINT SOURCE CATEGORY FOR THE PURPOSE OF DEVELOPING EFFLUENT LIMITATIONS GUIDELINES, FEDERAL STANDARDS OF PERFORMANCE, AND PRETREATMENT STANDARDS FOR THE INDUSTRY. EFFLUENT LIMITATIONS GUIDELINES WERE DEVELOPED, DEFINING THE DEGREE OF EFFLUENT REDUCTION ATTAINABLE THROUGH THE APPLICATION OF THE BEST PRACTICABLE CONTROL TECHNOLOGY CURRENTLY AVAILABLE AND THE BEST AVAILABLE TECHNOLOGY ECONOMICALLY ACHIEVABLE. THE STANDARDS OF PERFORMANCE FOR NEW SOURCES WERE ALSO DEFINED. PROCESSES, WASTES, AND COSTS ARE ALSO DISCUSSED.

WHO; Diseases Caused by Phosphorus and Its Toxic Compounds; Early Detection of Occupational Diseases pg 53-62 (1986). Review of diseases and health related effects resulting from exposure to phosphorus or phosphorus cmpd.

HEXAFLUOROPHOSPHORIC ACID reacts exothermically with chemical bases (examples: amines, amides, and inorganic hydroxides). These reactions can generate dangerously large amounts of heat in small spaces. Dilution may generate significant heat. Reacts with active metals, including such structural metals as aluminum and iron, to release hydrogen, a flammable gas. Can initiate the polymerization of certain alkenes. Reacts with cyanide compounds to release gaseous hydrogen cyanide. Generates flammable and/or toxic gases in contact with dithiocarbamates, isocyanates, mercaptans, nitrides, nitriles, sulfides, and strong reducing agents. Additional gas-generating reactions occur with sulfites, nitrites, thiosulfates (to give H2S and SO3), dithionites (SO2), and carbonates. May catalyze (increase the rate of) chemical reactions.

/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Health: TOXIC; inhalation, ingestion, or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.

/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Fire or Explosion: Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated.

/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Public Safety: CALL Emergency Response Telephone Number ... . As an immediate precautionary measure, isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids. Keep unauthorized personnel away. Stay upwind. Keep out of low areas. Ventilate enclosed areas.

/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Protective Clothing: Wear positive pressure self-contained breathing apparatus (SCBA). Wear chemical protective clothing that is specifically recommended by the manufacturer. It may provide little or no thermal protection. Structural firefighters' protective clothing provides limited protection in fire situations ONLY; it is not effective in spill situations where direct contact with the substance is possible.

For more DOT Emergency Guidelines (Complete) data for HEXAFLUOROPHOSPHORIC ACID (8 total), please visit the HSDB record page.

Hexafluorophosphoric acid

UN1782

Class 8 Corrosive material (49 eCFR § 173.136)

PG II: the degree of danger presented by the material is medium

· CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not available or no answer, refer to appropriate telephone number listed on the inside back cover.

· ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area.

Excerpt from ERG Guide 154 [Substances - Toxic and/or Corrosive (Non-Combustible)]:

General First Aid:

· Wear positive pressure self-contained breathing apparatus (SCBA).

1.0 [mg/m3], inhalable fraction, as F[German Research Foundation (DFG)]

SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.

Excerpt from ERG Guide 154 [Substances - Toxic and/or Corrosive (Non-Combustible)]:

Immediate precautionary measure

SYMPTOMATOLOGY (AFTER INGESTION...): 1. CORROSION OF MUCOUS MEMBRANES OF MOUTH, THROAT, & ESOPHAGUS, WITH IMMEDIATE PAIN & DYSPHAGIA. /ACIDS/

SYMPTOMATOLOGY (AFTER INGESTION...): 2. EPIGASTRIC PAIN, WHICH MAY BE ASSOCIATED WITH NAUSEA & VOMITING OF MUCOID & "COFFEE-GROUND" MATERIAL. INTENSE THIRST. /ACIDS/

SYMPTOMATOLOGY (AFTER INGESTION...): 3. CIRCULATORY COLLAPSE WITH CLAMMY SKIN, WEAK AND RAPID PULSE, SHALLOW RESPIRATIONS, & SCANTY URINE. CIRCULATORY SHOCK IS OFTEN IMMEDIATE CAUSE OF DEATH. /ACIDS/

SYMPTOMATOLOGY (AFTER INGESTION...): 4. ASPHYXIAL DEATH DUE TO GLOTTIC EDEMA. 5. ULCERATION OF ALL MEMBRANES AND TISSUES WITH WHICH ACID COMES IN CONTACT. ULCERATED AREAS OFTEN PERFORATE, LEADING TO MEDIASTINITIS OR PERITONITIS. /ACIDS/

For more Human Toxicity Excerpts (Complete) data for HEXAFLUOROPHOSPHORIC ACID (7 total), please visit the HSDB record page.

Used in metal cleaners and in electrolytic or chemical polishing agents for formation of protective coatings for metal surfaces; Also used as a catalyst, fluorinating agent, fungicide, and to make many hexafluorophosphates; [HSDB]

Acid and Alkali Cleaning of Metals [Category: Clean]

In metal cleaners, electrolytic or chem polishing agents, for formation of protective coating for metal surfaces.

Used catalytically, as a fluorinating reagent, as a fungicide, and extensively in the preparation of numerous hexafluorophosphates.

Phosphate(1-), hexafluoro-, hydrogen (1:1): ACTIVE

Anhydrous hexafluorophosphoric acid may be prepared at reduced temperatures and pressures but it dissociates rapidly into PF5 and HF at 25 °C.

Commercial hexafluorophosphoric acid is an aqueous solution. The HF, HPO2F2, and H3PO4 in equilibrium with the commercial product (approximately 60% HPF6) is equivalent to about 11% additional HPF5.