HYDROCHLORIC ACID, SOLUTION
|CAS Number||UN/NA Number||DOT Hazard Label||USCG CHRIS Code|
|NIOSH Pocket Guide||International Chem Safety Card|
|Health||3||Can cause serious or permanent injury.|
|Flammability||0||Will not burn under typical fire conditions.|
|Instability||1||Normally stable but can become unstable at elevated temperatures and pressures.|
- Known Catalytic Activity
No information available.
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 the immediate precautionary measure distance, in the downwind direction, as necessary.
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, 2020)
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. If it can be done safely, move undamaged containers away from the area around the fire. Avoid aiming straight or solid streams directly onto the product. Dike runoff from fire control for later disposal.
FIRE INVOLVING TANKS OR CAR/TRAILER LOADS: Fight fire from maximum distance or use unmanned master stream devices 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, 2020)
ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from 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, 2020)
Wear positive pressure self-contained breathing apparatus (SCBA). Wear chemical protective clothing that is specifically recommended by the manufacturer when there is NO RISK OF FIRE. Structural firefighters' protective clothing provides thermal protection but only limited chemical protection. (ERG, 2020)
|QS = Tychem 2000 SFR|
|QC = Tychem 2000|
|SL = Tychem 4000|
|C3 = Tychem 5000|
|TF = Tychem 6000|
|TP = Tychem 6000 FR|
|RC = Tychem RESPONDER® CSM|
|TK = Tychem 10000|
|RF = Tychem 10000 FR|
|Hydrochloric acid (37%)||7647-01-0||Liquid||54||140||>480||>480||>480||>480||>480||>480||>480|
|Hydrogen chloride (-90°C, liquid)||7647-01-0||Liquid||>180|
|Hydrogen chloride (gaseous)||7647-01-0||Vapor||imm||>480||>480||>480||>480||>480||>480||>480|
"imm" indicates immediate; having a normalized breakthrough time of 10 minutes or less.
Special Warning from DuPont: Tychem® and Tyvek® fabrics should not be used around heat, flames, sparks or in potentially flammable or explosive environments. Only...
INGESTION: have person drink water or milk; do NOT induce vomiting.
EYES: immediately flush with plenty of water for at least 15 min. and get medical attention; continue flushing for another 15 min. if physician does not arrive promptly.
SKIN: immediately flush skin while removing contaminated clothing; get medical attention promptly; use soap and wash area for at least 15 min. (USCG, 1999)
Note: For Vapor Density and Specific Gravity, comparing the value to 1.0 can tell you if the chemical will likely sink/rise in air or sink/float in fresh water (respectively). Short phrases have been added to those values below as an aid. However, make sure to also consider the circumstances of a release. The Vapor Density comparisons are only valid when the gas escaping is at the same temperature as the surrounding air itself. If the chemical is escaping from a container where it was pressurized or refrigerated, it may first escape and behave as a heavy gas and sink in the air (even if it has a Vapor Density value less than 1). Also, the Specific Gravity comparisons are for fresh water (density 1.0 g/mL). If your spill is in salt water (density about 1.027 g/mL), you need to adjust the point of comparison. There are some chemicals that will sink in fresh water and float in salt water.
AEGLs (Acute Exposure Guideline Levels)
|10 minutes||1.8 ppm||100 ppm||620 ppm|
|30 minutes||1.8 ppm||43 ppm||210 ppm|
|60 minutes||1.8 ppm||22 ppm||100 ppm|
|4 hours||1.8 ppm||11 ppm||26 ppm|
|8 hours||1.8 ppm||11 ppm||26 ppm|
ERPGs (Emergency Response Planning Guidelines)
|Hydrogen Chloride (7647-01-0)||3 ppm||20 ppm||150 ppm|
PACs (Protective Action Criteria)
|Hydrogen chloride; (Hydrochloric acid) (7647-01-0)||1.8 ppm||22 ppm||100 ppm|
EPA Consolidated List of Lists
|Regulatory Name||CAS Number/
313 Category Code
|CERCLA RQ||EPCRA 313
|Hydrochloric acid||7647-01-0||5000 pounds|
|Hydrochloric acid (aerosol forms only)||7647-01-0||5000 pounds||313|
|Hydrochloric acid (conc 37% or greater)||7647-01-0||5000 pounds||15000 pounds|
|Hydrogen chloride (anhydrous)||7647-01-0||500 pounds||5000 pounds||5000 pounds||X||5000 pounds|
|Hydrogen chloride (gas only)||7647-01-0||500 pounds||5000 pounds||5000 pounds||X||5000 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, 2022)
CISA Chemical Facility Anti-Terrorism Standards (CFATS)
|Chemical of Interest||CAS Number||Min Conc||STQ||Security
|Hydrochloric acid (conc. 37% or greater)||7647-01-0||37.00 %||15000 pounds||toxic|
|Hydrogen chloride (anhydrous)||7647-01-0||1.00 %||5000 pounds||toxic||ACG||500 pounds||WME|
- ACG = a commercial grade.
- WME = weapons of mass effect.
OSHA Process Safety Management (PSM) Standard List
|Chemical Name||CAS Number||Threshold Quantity (TQ)|
|Hydrochloric Acid, Anhydrous||7647-01-0||5000 pounds|
|Hydrogen Chloride||7647-01-0||5000 pounds|
Alternate Chemical Names
- CHLOROHYDRIC ACID
- DILUTE HYDROCHLORIC ACID
- HYDROCHLORIC ACID
- HYDROCHLORIC ACID (CONC 37% OR GREATER)
- HYDROCHLORIC ACID SOLUTION, [STABILIZED]
- HYDROCHLORIC ACID, SOLUTION
- HYDROGEN CHLORIDE (HCL)
- MURIATIC ACID