Name:
Nitric acid 20-70%
Synonym:
Azotic acid; Engravers acid; Aqua fortis
CAS:
7697-37-2
Section 1 - Chemical Product
MSDS Name:Nitric acid 20-70%
Synonym:Azotic acid; Engravers acid; Aqua fortis
Synonym:Azotic acid; Engravers acid; Aqua fortis
Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
| CAS# | Chemical Name | emsds | EINECS# |
| 7697-37-2 | Nitric acid | 20-70 | 231-714-2 |
| Hazard Symbols: C Risk Phrases: 35 |
Section 3 - HAZARDS IDENTIFICATION
EMERGENCY OVERVIEW
Causes severe burns.
Potential Health Effects
Eye:
Causes severe eye burns. Direct contact with liquid may cause blindness or permanent eye damage.
Skin:
Causes skin burns. May cause deep, penetrating ulcers of the skin.
Concentrated nitric acid dyes human skin yellow on contact.
Ingestion:
May cause severe and permanent damage to the digestive tract. Causes gastrointestinal tract burns. May cause perforation of the digestive tract. May cause systemic effects.
Inhalation:
Effects may be delayed. Causes chemical burns to the respiratory tract. Inhalation may be fatal as a result of spasm, inflammation, edema of the larynx and bronchi, chemical pneumonitis and pulmonary edema. Aspiration may lead to pulmonary edema. May cause systemic effects. May cause acute pulmonary edema, asphyxia, chemical pneumonitis, and upper airway obstruction caused by edema.
Chronic:
Exposure to high concentrations of nitric acid vapor may cause pneuomonitis and pulmonary edema which may be fatal. Symptoms may or may not be delayed. Continued exposure to the vapor & mist of nitric acid may result in a chronic bronchitis, & more severe exposure results in a chemical pneumonitis. The vapor & mists of nitric acid may erode the teeth, particularly affecting the canines & incisors.
Causes severe burns.
Potential Health Effects
Eye:
Causes severe eye burns. Direct contact with liquid may cause blindness or permanent eye damage.
Skin:
Causes skin burns. May cause deep, penetrating ulcers of the skin.
Concentrated nitric acid dyes human skin yellow on contact.
Ingestion:
May cause severe and permanent damage to the digestive tract. Causes gastrointestinal tract burns. May cause perforation of the digestive tract. May cause systemic effects.
Inhalation:
Effects may be delayed. Causes chemical burns to the respiratory tract. Inhalation may be fatal as a result of spasm, inflammation, edema of the larynx and bronchi, chemical pneumonitis and pulmonary edema. Aspiration may lead to pulmonary edema. May cause systemic effects. May cause acute pulmonary edema, asphyxia, chemical pneumonitis, and upper airway obstruction caused by edema.
Chronic:
Exposure to high concentrations of nitric acid vapor may cause pneuomonitis and pulmonary edema which may be fatal. Symptoms may or may not be delayed. Continued exposure to the vapor & mist of nitric acid may result in a chronic bronchitis, & more severe exposure results in a chemical pneumonitis. The vapor & mists of nitric acid may erode the teeth, particularly affecting the canines & incisors.
Section 4 - FIRST AID MEASURES
Eyes: Get medical aid immediately. Do NOT allow victim to rub eyes or keep eyes closed. Extensive irrigation with water is required (at least 30 minutes).
Skin:
Get medical aid immediately. Immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Destroy contaminated shoes.
Ingestion:
Do not induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
Inhalation:
Get medical aid immediately. Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Do NOT use mouth-to-mouth resuscitation. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
Notes to Physician:
Treat symptomatically and supportively.
Skin:
Get medical aid immediately. Immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Destroy contaminated shoes.
Ingestion:
Do not induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
Inhalation:
Get medical aid immediately. Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Do NOT use mouth-to-mouth resuscitation. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
Notes to Physician:
Treat symptomatically and supportively.
Section 5 - FIRE FIGHTING MEASURES
General Information:
As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Strong oxidizer. Contact with other material may cause fire. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use water spray to keep fire-exposed containers cool. May react with metal surfaces to form flammable and explosive hydrogen gas. Approach fire from upwind to avoid hazardous vapors and toxic decomposition products.
Extinguishing Media:
Use extinguishing media most appropriate for the surrounding fire.
As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Strong oxidizer. Contact with other material may cause fire. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use water spray to keep fire-exposed containers cool. May react with metal surfaces to form flammable and explosive hydrogen gas. Approach fire from upwind to avoid hazardous vapors and toxic decomposition products.
Extinguishing Media:
Use extinguishing media most appropriate for the surrounding fire.
Section 6 - ACCIDENTAL RELEASE MEASURES
General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Avoid runoff into storm sewers and ditches which lead to waterways.
Clean up spills immediately, observing precautions in the Protective Equipment section. Absorb spill using an absorbent, non-combustible material such as earth, sand, or vermiculite. Do not use combustible materials such as sawdust. Provide ventilation. Evacuate unnecessary personnel. Approach spill from upwind. Use water spray to cool and disperse vapors and protect personnel.
Spills/Leaks:
Avoid runoff into storm sewers and ditches which lead to waterways.
Clean up spills immediately, observing precautions in the Protective Equipment section. Absorb spill using an absorbent, non-combustible material such as earth, sand, or vermiculite. Do not use combustible materials such as sawdust. Provide ventilation. Evacuate unnecessary personnel. Approach spill from upwind. Use water spray to cool and disperse vapors and protect personnel.
Section 7 - HANDLING and STORAGE
Handling:
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Do not breathe dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Keep container tightly closed.
Avoid contact with clothing and other combustible materials. Discard contaminated shoes. Do not use with metal spatula or other metal items. Use only with adequate ventilation or respiratory protection.
Storage:
Do not store near combustible materials. Do not store in direct sunlight. Keep container closed when not in use. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep away from metals. Store away from alkalies. Separate from organic materials. Inspect periodically for damage or evidence of leaks or corrosion.
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Do not breathe dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Keep container tightly closed.
Avoid contact with clothing and other combustible materials. Discard contaminated shoes. Do not use with metal spatula or other metal items. Use only with adequate ventilation or respiratory protection.
Storage:
Do not store near combustible materials. Do not store in direct sunlight. Keep container closed when not in use. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep away from metals. Store away from alkalies. Separate from organic materials. Inspect periodically for damage or evidence of leaks or corrosion.
Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION
Engineering Controls:
Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower. Use adequate general or local exhaust ventilation to keep airborne concentrations below the permissible exposure limits. Use a corrosion-resistant ventilation system.
Exposure Limits CAS# 7697-37-2: United Kingdom, WEL - TWA: 2 ppm TWA; 5.2 mg/m3 TWA United Kingdom, WEL - STEL: 4 ppm STEL; 10 mg/m3 STEL United States OSHA: 2 ppm TWA; 5 mg/m3 TWA Belgium - TWA: 2 ppm VLE; 5.3 mg/m3 VLE Belgium - STEL: 4 ppm VLE; 10 mg/m3 VLE France - VME: 2 ppm VME; 5 mg/m3 VME France - VLE: 4 ppm VLE; 10 mg/m3 VLE Germany: 2 ppm TWA; 5.2 mg/m3 TWA Japan: 2 ppm OEL; 5.2 mg/m3 OEL Malaysia: 2 ppm TWA; 5.2 mg/m3 TWA Netherlands: 0.5 ppm STEL; 1.3 mg/m3 STEL Russia: 2 mg/m3 TWA Spain: 2 ppm VLA-ED; 5.2 mg/m3 VLA-ED Spain: 4 ppm VLA-EC; 10 mg/m3 VLA-EC CAS# 7732-18-5: Personal Protective Equipment Eyes: Wear chemical splash goggles and face shield.
Skin:
Wear appropriate gloves to prevent skin exposure.
Clothing:
Wear appropriate clothing to prevent skin exposure.
Respirators:
Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece airline respirator in the positive pressure mode with emergency escape provisions.
Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower. Use adequate general or local exhaust ventilation to keep airborne concentrations below the permissible exposure limits. Use a corrosion-resistant ventilation system.
Exposure Limits CAS# 7697-37-2: United Kingdom, WEL - TWA: 2 ppm TWA; 5.2 mg/m3 TWA United Kingdom, WEL - STEL: 4 ppm STEL; 10 mg/m3 STEL United States OSHA: 2 ppm TWA; 5 mg/m3 TWA Belgium - TWA: 2 ppm VLE; 5.3 mg/m3 VLE Belgium - STEL: 4 ppm VLE; 10 mg/m3 VLE France - VME: 2 ppm VME; 5 mg/m3 VME France - VLE: 4 ppm VLE; 10 mg/m3 VLE Germany: 2 ppm TWA; 5.2 mg/m3 TWA Japan: 2 ppm OEL; 5.2 mg/m3 OEL Malaysia: 2 ppm TWA; 5.2 mg/m3 TWA Netherlands: 0.5 ppm STEL; 1.3 mg/m3 STEL Russia: 2 mg/m3 TWA Spain: 2 ppm VLA-ED; 5.2 mg/m3 VLA-ED Spain: 4 ppm VLA-EC; 10 mg/m3 VLA-EC CAS# 7732-18-5: Personal Protective Equipment Eyes: Wear chemical splash goggles and face shield.
Skin:
Wear appropriate gloves to prevent skin exposure.
Clothing:
Wear appropriate clothing to prevent skin exposure.
Respirators:
Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece airline respirator in the positive pressure mode with emergency escape provisions.
Section 9 - PHYSICAL AND CHEMICAL PROPERTIES
Physical State: Liquid
Color: clear to yellow
Odor: strong odor - acrid odor - suffocating odor
pH: 1.0 (0.1M soln)
Vapor Pressure: 7.1 mm Hg @ 20 deg C (70% acid)
Viscosity: 0.761 cps @ 25 deg C
Boiling Point: 86 deg C
Freezing/Melting Point: -42 deg C
Autoignition Temperature: Not available.
Flash Point: Not applicable.
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature: Not available.
Solubility in water: Soluble in water.
Specific Gravity/Density: 1.4
Molecular Formula: HNO3
Molecular Weight: 63.01
Section 10 - STABILITY AND REACTIVITY
Chemical Stability:
Stable. Decomposes when in contact with air, light, or organic matter. The yellow color is due to release of nitrogen dioxide on exposure to light.
Conditions to Avoid:
High temperatures, light, confined spaces.
Incompatibilities with Other Materials:
Metals, reducing agents, strong bases, acetic acid, alcohols, acetone, aniline, hydrogen sulfide, metal powders, carbides, aldehydes, organic solvents, combustible materials, chromic acid, flammable liquids, cyanides, sulfides, Incompatible with many substances.
Hazardous Decomposition Products:
Nitrogen oxides.
Hazardous Polymerization: Has not been reported.
Stable. Decomposes when in contact with air, light, or organic matter. The yellow color is due to release of nitrogen dioxide on exposure to light.
Conditions to Avoid:
High temperatures, light, confined spaces.
Incompatibilities with Other Materials:
Metals, reducing agents, strong bases, acetic acid, alcohols, acetone, aniline, hydrogen sulfide, metal powders, carbides, aldehydes, organic solvents, combustible materials, chromic acid, flammable liquids, cyanides, sulfides, Incompatible with many substances.
Hazardous Decomposition Products:
Nitrogen oxides.
Hazardous Polymerization: Has not been reported.
Section 11 - TOXICOLOGICAL INFORMATION
RTECS#:
CAS# 7697-37-2: QU5775000 QU5900000 CAS# 7732-18-5: ZC0110000 LD50/LC50:
CAS# 7697-37-2: Inhalation, rat: LC50 = 260 mg/m3/30M; Inhalation, rat: LC50 = 130 mg/m3/4H; Inhalation, rat: LC50 = 67 ppm(NO2)/4H.
CAS# 7732-18-5: Oral, rat: LD50 = >90 mL/kg.
Carcinogenicity:
Nitric acid - Not listed by ACGIH, IARC, or NTP.
Water - Not listed by ACGIH, IARC, or NTP.
Other:
See actual entry in RTECS for complete information.
CAS# 7697-37-2: QU5775000 QU5900000 CAS# 7732-18-5: ZC0110000 LD50/LC50:
CAS# 7697-37-2: Inhalation, rat: LC50 = 260 mg/m3/30M; Inhalation, rat: LC50 = 130 mg/m3/4H; Inhalation, rat: LC50 = 67 ppm(NO2)/4H.
CAS# 7732-18-5: Oral, rat: LD50 = >90 mL/kg.
Carcinogenicity:
Nitric acid - Not listed by ACGIH, IARC, or NTP.
Water - Not listed by ACGIH, IARC, or NTP.
Other:
See actual entry in RTECS for complete information.
Section 12 - ECOLOGICAL INFORMATION
Other No information available.
Section 13 - DISPOSAL CONSIDERATIONS
Products which are considered hazardous for supply are classified as Special Waste and the disposal of such chemicals is covered by regulations which may vary according to location. Contact a specialist disposal company or the local waste regulator for advice. Empty containers must be decontaminated before returning for recycling.
Section 14 - TRANSPORT INFORMATION
IATA
Shipping Name: NITRIC ACID
Hazard Class: 8
UN Number: 2031
Packing Group: II
IMO
Shipping Name: NITRIC ACID
Hazard Class: 8
UN Number: 2031
Packing Group: II
RID/ADR
Shipping Name: NITRIC ACID
Hazard Class: 8
UN Number: 2031
Packing group: II
USA RQ: CAS# 7697-37-2: 1000 lb final RQ; 454 kg final RQ
Section 15 - REGULATORY INFORMATION
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: C
Risk Phrases:
R 35 Causes severe burns.
Safety Phrases:
S 23 Do not inhale gas/fumes/vapour/spray.
S 26 In case of contact with eyes, rinse immediately
with plenty of water and seek medical advice.
S 36 Wear suitable protective clothing.
S 45 In case of accident or if you feel unwell, seek
medical advice immediately (show the label where
possible).
WGK (Water Danger/Protection)
CAS# 7697-37-2: 1
CAS# 7732-18-5: No information available.
Canada
CAS# 7697-37-2 is listed on Canadas DSL List.
CAS# 7732-18-5 is listed on Canadas DSL List.
CAS# 7697-37-2 is listed on Canadas Ingredient Disclosure List.
CAS# 7732-18-5 is not listed on Canadas Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 7697-37-2 is listed on the TSCA inventory.
CAS# 7732-18-5 is listed on the TSCA inventory.
