HYDROFLUORIC ACID, SOLUTION
|CAS Number||UN/NA Number||DOT Hazard Label||USCG CHRIS Code|
|Health||4||Can be lethal.|
|Flammability||0||Will not burn under typical fire conditions.|
|Instability||1||Normally stable but can become unstable at elevated temperatures and pressures.|
|NIOSH Pocket Guide||International Chem Safety Card|
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. For UN1796, UN1826, UN2031 at high concentrations and for UN2032, these may act as oxidizers, also consult ERG Guide 140. Vapors may accumulate in confined areas (basement, tanks, hopper/tank cars, etc.). Substance may react with water (some violently), releasing corrosive and/or toxic gases and runoff. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water. (ERG, 2016)
TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns or death. Reaction with water or moist air may release toxic, corrosive or flammable gases. Reaction with water may generate much heat that will increase the concentration of fumes in the air. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution. (ERG, 2016)
Mixing in equal molar portions with any of the following substances in a closed container caused the temperature and pressure to increase: acetic anhydride, 2-aminoethanol, chlorosulfonic acid, aqueous ammonia (48.7%), ethylenediamine, ethyleneimine, oleum, aqueous sulfuric acid (48.7%), aqueous sodium hydroxide (48.7%), propylene oxide, vinyl acetate [NFPA 1991].
Use caution: Liquids with this reactive group classification have been known to react with the absorbents listed below. More info about absorbents, including situations to watch out for...
- Mineral-Based & Clay-Based Absorbents
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.
SPILL: Increase, in the downwind direction, as necessary, the isolation distance shown above.
FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2016)
Note: Some foams will react with the material and release corrosive/toxic gases.
SMALL FIRE: CO2 (except for Cyanides), dry chemical, dry sand, alcohol-resistant foam.
LARGE FIRE: Water spray, fog or alcohol-resistant foam. Move containers from fire area if you can do it without risk. Use water spray or fog; do not use straight streams. Dike fire-control water for later disposal; do not scatter the material.
FIRE INVOLVING TANKS OR CAR/TRAILER LOADS: Fight fire from maximum distance or use unmanned hose holders or monitor nozzles. Do not get water inside containers. Cool containers with flooding quantities of water until well after fire is out. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks engulfed in fire. (ERG, 2016)
ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area). All equipment used when handling the product must be grounded. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. A vapor-suppressing foam may be used to reduce vapors. DO NOT GET WATER INSIDE CONTAINERS. Use water spray to reduce vapors or divert vapor cloud drift. Avoid allowing water runoff to contact spilled material. Prevent entry into waterways, sewers, basements or confined areas.
SMALL SPILL: Cover with DRY earth, DRY sand or other non-combustible material followed with plastic sheet to minimize spreading or contact with rain. Use clean, non-sparking tools to collect material and place it into loosely covered plastic containers for later disposal. (ERG, 2016)
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 availability of water from a sink or hose could be considered adequate.] (NIOSH, 2016)
|QC = Tychem QC|
|SL = Tychem SL|
|TF = Tychem F|
|TP = Tychem ThermoPro|
|C3 = Tychem CPF 3|
|BR = Tychem BR|
|RC = Tychem Responder® CSM|
|TK = Tychem TK|
|RF = Tychem Reflector®|
|Hydrofluoric acid (48-51%)||7664-39-3||Liquid||400||>480||>480||15||180||>480||>480||>480||>480|
|Hydrofluoric acid (60%)||7664-39-3||Liquid||52|
|Hydrofluoric acid (70%)||7664-39-3||Liquid||143||35||126||>480||>480||>480||>480|
|Hydrogen fluoride (gas)||7664-39-3||Vapor||imm.||35||imm.||imm.||170||135||135||>480||>480|
"imm." indicates immediate; having a normalized breakthrough time of 10 minutes or less.
A blank cell indicates the fabric has not been tested. The fabric may or may not offer barrier.
Special Warnings from DuPont
- Serged and bound seams are degraded by some hazardous liquid chemicals, such as strong acids, and should not be worn when these chemicals are present.
CAUTION: This information is based upon technical data that
DuPont believes to be reliable. It is subject to revision as
additional knowledge and experience are gained. DuPont makes no
guarantee of results and assumes no obligation or liability...
... in connection with this information. It is the user's responsibility to determine the level of toxicity and the proper personal protective equipment needed. The information set forth herein reflects laboratory performance of fabrics, not complete garments, under controlled conditions. It is intended for informational use by persons having technical skill for evaluation under their specific end-use conditions, at their own discretion and risk. Anyone intending to use this information should first verify that the garment selected is suitable for the intended use. In many cases, seams and closures have shorter breakthrough times and higher permeation rates than the fabric. Please contact DuPont for specific data. If fabric becomes torn, abraded or punctured, or if seams or closures fail, or if attached gloves, visors, etc. are damaged, end user should discontinue use of garment to avoid potential exposure to chemical. Since conditions of use are outside our control, we make no warranties, express or implied, including, without limitation, no warranties of merchantability or fitness for a particular use and assume no liability in connection with any use of this information. This information is not intended as a license to operate under or a recommendation to infringe any patent or technical information of DuPont or others covering any material or its use.
Skin: If this chemical in solution or in liquid form contacts the skin, immediately flush the contaminated skin with water. If this chemical penetrates the clothing, immediately remove the clothing and flush the skin with water. Get medical attention promptly.
Breathing: If a person breathes large amounts of this chemical, move the exposed person to fresh air at once. If breathing has stopped, perform mouth-to-mouth resuscitation. Keep the affected person warm and at rest. Get medical attention as soon as possible.
Swallow: If this chemical in solution has been swallowed, get medical attention immediately. (NIOSH, 2016)
AEGLs (Acute Exposure Guideline Levels)
|10 minutes||1 ppm||95 ppm||170 ppm|
|30 minutes||1 ppm||34 ppm||62 ppm|
|60 minutes||1 ppm||24 ppm||44 ppm|
|4 hours||1 ppm||12 ppm||22 ppm|
|8 hours||1 ppm||12 ppm||22 ppm|
ERPGs (Emergency Response Planning Guidelines)
|Hydrogen Fluoride (7664-39-3) **||2 ppm||20 ppm||50 ppm|
indicates that odor should be detectable near ERPG-1.
PACs (Protective Action Criteria)
|Hydrogen fluoride; (Hydrofluoric acid) (7664-39-3)||1 ppm||24 ppm||44 ppm|
EPA Consolidated List of Lists
|Regulatory Name||CAS Number/
313 Category Code
|CERCLA RQ||EPCRA 313
|Hydrofluoric acid||7664-39-3||100 pounds||100 pounds||100 pounds||X||U134|
|Hydrofluoric acid (conc. 50% or greater)||7664-39-3||100 pounds||100 pounds||100 pounds||X||U134||1000 pounds|
|Hydrogen fluoride||7664-39-3||100 pounds||100 pounds||100 pounds||313||U134|
|Hydrogen fluoride (anhydrous)||7664-39-3||100 pounds||100 pounds||100 pounds||X||U134||1000 pounds|
- "X" indicates that this is a second name for an EPCRA section 313 chemical already included on this consolidated list. May also indicate that the same chemical with the same CAS number appears on another list with a different chemical name.
(EPA List of Lists, 2015)
DHS Chemical Facility Anti-Terrorism Standards (CFATS)
|Chemical of Interest||CAS Number||Min Conc||STQ||Security
|Hydrofluoric acid (conc. 50% or greater)||7664-39-3||50.00 %||1000 pounds||toxic|
|Hydrogen fluoride (anhydrous)||7664-39-3||1.00 %||1000 pounds||toxic||42.53 %||45 pounds||WME|
- WME = weapons of mass effect.
Alternate Chemical Names
- ALSURF 45
- ANTISAL 2B
- AQUEOUS HYDROGEN FLUORIDE (I.E., HYDROFLUORIC ACID)
- FLUORHYDRIC ACID
- FLUORIC ACID
- FLUORINE HYDRIDE (FH)
- FLUORINE MONOHYDRIDE
- HYDROFLUORIC ACID
- HYDROFLUORIC ACID (CONC. 50% OR GREATER)
- HYDROFLUORIC ACID, SOLUTION
- HYDROGEN FLUORIDE (HF)
- HYDROGEN FLUORIDE (HYDROFLUORIC ACID)
- HYDROGEN MONOFLUORIDE