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MSDS 
:
 Nitric Acid, 50%
CAS 
:
 7697-37-2
SYNONYMS 
:
 Azotic acid; Engravers nitrate; Hydrogen nitrate.
**** SECTION 2 - COMPOSITION, INFORMATION ON INGREDIENTS ****

+----------------+--------------------------------------+----------+-----------+
| CAS# | Chemical Name | % | EINECS# |
|----------------|--------------------------------------|----------|-----------|
| 7697-37-2 |Nitric acid | 50.0 | 231-714-2 |
|----------------|--------------------------------------|----------|-----------|
| 7732-18-5 |Water | 50.0 | 231-791-2 |
+----------------+--------------------------------------+----------+-----------+
Hazard Symbols: O C
Risk Phrases: 35 8

**** SECTION 3 - HAZARDS IDENTIFICATION ****

EMERGENCY OVERVIEW
Causes severe burns. Contact with combustible material may cause
fire.Corrosive.

Potential Health Effects
Eye:
Causes severe eye burns. May cause irreversible eye injury. May
cause chemical conjunctivitis and corneal damage.
Skin:
Causes skin burns. May cause deep, penetrating ulcers of the skin.
May cause skin rash (in milder cases), and cold and clammy skin with
cyanosis or pale color.
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:
Repeated inhalation may cause chronic bronchitis. Repeated exposure
may cause erosion of teeth. Effects may be delayed.

**** SECTION 4 - FIRST AID MEASURES ****

Eyes:
Get medical aid immediately. Do NOT allow victim to rub 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
soap and 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 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:

**** 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 combustible materials
may cause a 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. Substance is
noncombustible. Use water with caution and in flooding amounts.
Extinguishing Media:
Substance is noncombustible; use agent most appropriate to
extinguish surrounding fire. Contact professional fire-fighters
immediately.

**** SECTION 6 - ACCIDENTAL RELEASE MEASURES ****

General Information: Use proper personal protective equipment as indicated
in Section 8.
Spills/Leaks:
Absorb spill with inert material (e.g. vermiculite, sand or earth),
then place in suitable container. Avoid runoff into storm sewers and
ditches which lead to waterways. Clean up spills immediately,
observing precautions in the Protective Equipment section. Neutralize
spill with sodium bicarbonate. Remove all sources of ignition.
Provide ventilation. A vapor suppressing foam may be used to reduce
vapors.

**** SECTION 7 - HANDLING and STORAGE ****

Handling:
Wash thoroughly after handling. Remove contaminated clothing and
wash before reuse. Use only in a well-ventilated area. Do not breathe
dust, vapor, mist, or gas. Keep container tightly closed. Avoid
contact with clothing and other combustible materials. Do not get on
skin or in eyes. Avoid ingestion and inhalation. Discard
contaminated shoes.
Storage:
Keep away from heat, sparks, and flame. Do not store near
combustible materials. Keep container closed when not in use. Store
in a cool, dry, well-ventilated area away from incompatible
substances. Bottles should be vented periodically in order to
overcome pressure buildup.

**** 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.
Personal Protective Equipment

Eyes:
Wear chemical goggles.
Skin:
Wear appropriate gloves to prevent skin exposure.
Clothing:
Wear a chemical apron. 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
Appearance: clear to yellow
Odor: strong odor - acrid odor
pH: 1.0
Vapor Pressure: 6.8 mm Hg
Viscosity: Not available.
Boiling Point: 122 deg C
Freezing/Melting Point: -42 deg C
Autoignition Temperature: Not available.
Flash Point: Not available.
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature: Not available.
Solubility in water: Soluble.
Specific Gravity/Density: 1.38
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.
Conditions to Avoid:
High temperatures, moisture.
Incompatibilities with Other Materials:
Reducing agents, acids (organic, e.g. acetic acid, benzoic acid,
formic acid, methanoic acid, oxalic acid), alcohols and glycols
(e.g. butyl alcohol, ethanol, methanol, ethylene glycol), aldehydes
(e.g. acetaldehyde, acrolein, chloral hydrate, formaldehyde), amides
(e.g. butyramide, diethyltoluamide, dimethyl formamide), amines
(aliphatic and aromatic, e.g. dimethyl amine, propylamine, pyridine,
triethylamine), azo, diazo, and hydrazines (e.g. dimethyl hydrazine,
hydrazine, methyl hydrazine), carbamates (e.g. carbanolate,
carbofuran), caustics (e.g. ammonia, ammonium hydroxide, calcium
hydroxide, potassium hydroxide, sodium hydroxide), cyanides (e.g.
potassium cyanide, sodium cyanide), dithiocarbamates (e.g. ferbam,
maneb, metham, thiram), esters (e.g. butyl acetate, ethyl acetate,
propyl formate), ethers (e.g. dioxane, furfuran, tetrahydrofuran
(THF)), fluorides (inorganic, e.g. ammonium fluoride, calcium
fluoride, cesium fluoride), hydrocarbons (aromatic, e.g. benzene,
chrysene, cumen.
Hazardous Decomposition Products:
Nitrogen oxides, hydrogen gas.
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 = 67 ppm(NO2)/4H.
CAS# 7732-18-5: Oral, rat: LD50 = >90 mL/kg.
Carcinogenicity:
Nitric acid -
Not listed by ACGIH, IARC, NIOSH, NTP, or OSHA.
Water -
Not listed by ACGIH, IARC, NIOSH, NTP, or OSHA.
Other:
See actual entry in RTECS for complete information.

**** SECTION 12 - ECOLOGICAL INFORMATION ****

Other
For more information, see "HANDBOOK OF ENVIRONMENTAL FATE AND
EXPOSURE DATA."

**** SECTION 13 - DISPOSAL CONSIDERATIONS ****

Dispose of in a manner consistent with federal, state, and local regulations.

**** 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
Dangerous Goods Code: 8(2B)
UN Number: 2031

**** SECTION 15 - REGULATORY INFORMATION ****

European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: O C
Risk Phrases:
R 35 Causes severe burns.
R 8 Contact with combustible material may cause
fire.
Safety Phrases:
S23B Do not breathe fumes.
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.
United Kingdom Occupational Exposure Limits
CAS# 7697-37-2: OES-United Kingdom, TWA 2 ppm TWA; 5.2 mg/m3 TWA
CAS# 7697-37-2: OES-United Kingdom, STEL 4 ppm STEL; 10 mg/m3 STEL
CAS# 7697-37-2: OES-United Kingdom, STEL 4 ppm STEL; 10 mg/m3 STEL

Canada
CAS# 7697-37-2 is listed on Canada's DSL List.
CAS# 7732-18-5 is listed on Canada's DSL List.
CAS# 7697-37-2 is listed on Canada's Ingredient Disclosure List.
CAS# 7732-18-5 is not listed on Canada's Ingredient Disclosure List.
Exposure Limits
CAS# 7697-37-2: OEL-ARAB Republic of Egypt:TWA 2 ppm (5 mg/m3)
OEL-AUSTRALIA:TWA 2 ppm (5 mg/m3);STEL 4 ppm (10 mg/m3)
OEL-BELGIUM:TWA 2 ppm (5.2 mg/m3);STEL 4 ppm (10 mg/m3)
OEL-CZECHOSLOVAKIA:TWA 2.5 mg/m3;STEL 5 mg/m3
OEL-DENMARK:TWA 2 ppm (5 mg/m3)
OEL-FINLAND:TWA 2 ppm (5 mg/m3);STEL 5 ppm (13 mg/m3);Skin
OEL-FRANCE:TWA 2 ppm (5 mg/m3);STEL 4 ppm (10 mg/m3)
OEL-GERMANY:TWA 10 ppm (25 mg/m3)
OEL-HUNGARY:STEL 5 mg/m3
OEL-JAPAN:TWA 2 ppm (5.2 mg/m3)
OEL-THE PHILIPPINES:TWA 2 ppm (5 mg/m3)
OEL-POLAND:TWA 10 mg/m3
OEL-RUSSIA:TWA 2 ppm;STEL 2 mg/m3;Skin
OEL-SWEDEN:TWA 2 ppm (5 mg/m3);STEL 5 ppm (13 mg/m3)
OEL-SWITZERLAND:TWA 2 ppm (5 mg/m3);STEL 4 ppm (1 mg/m3)
OEL-THAILAND:TWA 2 ppm (5 mg/m3)
OEL-TURKEY:TWA 2 ppm (5 mg/m3)
OEL-UNITED KINGDOM:TWA 2 ppm (5 mg/m3);STEL 4 ppm (10 mg/m3)
OEL IN BULGARIA, COLOMBIA, JORDAN, KOREA check ACGIH TLV
OEL IN NEW ZEALAND, SINGAPORE, VIETNAM check ACGI TLV
US FEDERAL
TSCA
CAS# 7697-37-2 is listed on the TSCA inventory.
CAS# 7732-18-5 is listed on the TSCA inventory.

**** SECTION 16 - ADDITIONAL INFORMATION ****

MSDS Creation Date: 1/14/2002 Revision #1 Date: 1/14/2002

The information above is believed to be accurate and represents the best
information currently available to us. However, we make no warranty of
merchantability or any other warranty, express or implied, with respect to
such information, and we assume no liability resulting from its use. Users
should make their own investigations to determine the suitability of the
information for their particular purposes. In no way shall the company be
liable for any claims, losses, or damages of any third party or for lost
profits or any special, indirect, incidental, consequential or exemplary
damages, howsoever arising, even if the company has been advised of
the possibility of such damages.
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ALL MSDS PAGES IN THIS GROUP
NAMECAS
Isopropanol, 70.0% 67-63-0
Di-tert-butyl dicarbonate 24424-99-5
DL-Phenylsuccinic Acid, 98% 635-51-8
Nitric Acid, 50% 7697-37-2
Ammonium Thiocyanate, 0.1N 1762-95-4
Potassium Hydroxide, 1.0N 1310-58-3
Potassium Hydroxide, 0.5N Solution in Ethanol 64-17-5
Nitric acid, 1.0N aqueous solution 7697-37-2
Ammonium hydroxide water solution, <3N NH4OH (<5% as ammonia, NH3) 1336-21-6
Lactic Acid, 1.0 N 50-21-5
Citric acid, 1.0M aqueous solution 77-92-9
Ammonium hydroxide water solution, >3N but <5.7N NH4OH (>5% but <10% 1336-21-6
Ammonium oxalate, 4% aqueous solution w/v 1113-38-8
Potassium Hydroxide Solution, 10.0% 1310-58-3
M-Cresol Purple, 0.1% 2303-01-7
Cresol Red Indicator Solution, 0.04% 7732-18-5
Barium chloride, 0.1N aqueous solution 7732-18-5
Chromic Acid, 10.0% 1333-82-0
2-Chloro-4-(3-Chlorophenyl)-Quinazoline 0-01-1
9-[2-(tert-Butyldimethylsilanyloxy)ethyl]-6-chloro-9H-purine. 0-01-1
3-Phenoxypropyl Bromide, 95% 588-63-6
7-[2-(tert-Butyl-Dimethyl-Silanyloxy)-Ethyl]-6-Chloro-7H-Purine 0-01-1
4-Chloro-5-(2,4-Dichlorophenoxy)-2,6-Dimethyl-Pyrimidine 0-01-1
4-Chloro-6-(4-Methoxy Benzyl) Pyrimidine 0-01-1
6-Chloro-9-Ethyl-9H-Purine 5462-86-2
Propiolic acid, 98% 471-25-0
2-Chloro-4-o-Tolyl Pyrimidine 0-01-1
2-Chloro-4-(3-Chlorophenyl) Pyrimidine 0-01-1
Piperazine, anhydrous, 99% 110-85-0
2,2,2-Trifluoroethylhydrazine, 60 wt% aqueous solution 5042-30-8
4-Chloro-2,6-Dimethyl Pyrimidine 0-01-1
2-Chloro-4-(2-Methyl-2H-Pyrazol-3-yl)-Quinazoline 0-01-1
2-Chloro-4-Pyridin-2-yl-Quinazoline 0-01-1
4-Chloro-7H-Pyrrolo [2,3-d] Pyrimidine 3680-69-1
2-Chloro-4-(1-Methyl-1H-Imidazol-2-yl)-Quinazoline 0-01-1
4,5-Dichloro-6-Ethyl Pyrimidine 0-01-1
4-Chloro-6-(4-Methoxyphenyl)-2-Methyl Pyrimidine 142220-68-6
QUANTI-CULT, Dehydrated Live Organisms 0-00-0
Lancerclean Acid 64-19-7
Carbonate Buffer 497-19-8
Disodium p-Nitrophenyl Phosphate 0-01-1
Cryoscope Bath Liquid 107-21-1
Iron Alum Indicator 7697-37-2
Kovacs Reagent 71-41-0
(1R)-endo-(+)-Fenchol, 96% 2217-02-9
Cryoscope Standards 0-01-1
Diamond Slurry, Water, MD, 30UM 0-01-1
Acetic acid/chloroform, 2:1 mix 64-19-7
Acetic acid, 3% 64-19-7
Congo Red Indicator, 0.1% aqueous 573-58-0

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