MSDS Number: N3660 * * * * * Effective Date: 07/02/02 * * * * * Supercedes:
07/13/00
NITRIC ACID, 50-70%
1. Product Identification
Synonyms: Aqua Fortis; Azotic Acid; Nitric Acid 50%; Nitric Acid 65%;
nitric acid 69-70%
CAS No.: 7697-37-2
Molecular Weight: 63.01
Chemical Formula: HNO3
Product Codes:
J.T. Baker: 411D, 412D, 5371, 5796, 5801, 5826, 5856, 5876, 5896, 9597,
9598, 9600, 9601, 9602, 9603, 9604, 9606, 9607, 9608, 9610, 9616, 9617,
9670
Mallinckrodt: 1409, 2704, 2716, 6623, H862, H993, H998, V077, V633,
V650
2. Composition/Information on Ingredients
Ingredient CAS No Percent
Hazardous
————————————— ———— ————
———
Nitric Acid 7697-37-2 50 – 70%
Yes
Water 7732-18-5 30 – 50%
No

3. Hazards Identification
Emergency Overview
————————–
POISON! DANGER! STRONG OXIDIZER. CONTACT WITH
OTHER MATERIAL MAY CA– USE FIRE. CORROSIVE. LIQUID
AND MIST CA– USE SEVERE BURNS TO ALL BODY TISSUE.
MAY BE FATAL IF SWALLOWED OR INHALED. INHALATION
MAY CA– USE LUNG AND TOOTH DAMAGE.
SAF-T-DATA
(tm)
Ratings (Provided here for your convenience)
——————————————————————————————
—————–
Health Rating: 4 – Extreme (Poison)
Flammability Rating: 0 – None
Reactivity Rating: 3 – Severe (Oxidizer)
Contact Rating: 4 – Extreme (Corrosive)
Lab Protective Equip: GOGGLES & SHIELD; LAB COAT & APRON;
VENT HOOD; PROPER GLOVES
Storage Color Code: White (Corrosive)
——————————————————————————————
—————–
Potential Health Effects
———————————-
Nitric acid is extremely hazardous; it is corrosive, reactive, an oxidizer,
and a poison.
Inhalation:
Corrosive! Inhalation of vapors can cause breathing difficulties and lead to
pneumonia and pulmonary edema, which may be fatal. Other symptoms
may include coughing, choking, and irritation of the nose, throat, and
respiratory tract.
Ingestion:
Corrosive! Swallowing nitric acid can cause immediate pain and burns of
the mouth, throat, esophagus and gastrointestinal tract.
Skin Contact:
Corrosive! Can cause redness, pain, and severe skin burns. Concentrated
solutions cause deep ulcers and stain skin a yellow or yellow-brown color.
Eye Contact:
Corrosive! Vapors are irritating and may cause damage to the eyes.
Contact may cause severe burns and permanent eye damage.
Chronic Exposure:
Long-term exposure to concentrated vapors may cause erosion of teeth

and lung damage. Long-term exposures seldom occur due to the corrosive
properties of the acid.
Aggravation of Pre-existing Conditions:
Persons with pre-existing skin disorders, eye disease, or cardiopulmonary
diseases may be more susceptible to the effects of this substance.
4. First Aid Measures
Immediate first aid treatment reduces the health effects of this substance.
Inhalation:
Remove to fresh air. If not breathing, give artificial respiration. If
breathing is difficult, give oxygen. Call a physician.
Ingestion:
DO NOT INDUCE VOMITING! Give large quantities of water or milk if
available. Never give anything by mouth to an unconscious person. Get
medical attention immediately.
Skin Contact:
In case of contact, immediately flush skin with plenty of water for at least
15 minutes while removing contaminated clothing and shoes. Wash
clothing before reuse. Thoroughly clean shoes before reuse. Get medical
attention immediately.
Eye Contact:
Immediately flush eyes with plenty of water for at least 15 minutes, lifting
lower and upper eyelids occasionally. Get medical attention immediately.
5. Fire Fighting Measures
Fire:
Not combustible, but substance is a strong oxidizer and its heat of reaction
with reducing agents or combustibles may cause ignition. Can react with
metals to release flammable hydrogen gas.
Explosion:
Reacts explosively with combustible organic or readily oxidizable
materials such as: alcohols, turpentine, charcoal, organic refuse, metal
powder, hydrogen sulfide, etc. Reacts with most metals to release
hydrogen gas which can form explosive mixtures with air.
Fire Extinguishing Media:
Water spray may be used to keep fire exposed containers cool. Do not get
water inside container.
Special Information:
Increases the flammability of combustible, organic and readily oxidizable
materials. In the event of a fire, wear full protective clothing and NIOSH-
approved self-contained breathing apparatus with full facepiece operated
in the pressure demand or other positive pressure mode.

6. Accidental Release Measures
Ventilate area of leak or spill. Wear appropriate personal protective
equipment as specified in Section 8. Isolate hazard area. Keep unnecessary
and unprotected personnel from entering. Contain and recover liquid when
possible. Neutralize with alkaline material (soda ash, lime), then absorb
with an inert material (e. g., vermiculite, dry sand, earth), and place in a
chemical waste container. Do not use combustible materials, such as saw
dust. Do not flush to sewer! US Regulations (CERCLA) require reporting
spills and releases to soil, water and air in excess of reportable quantities.
The toll free number for the US Coast Guard National Response Center is
(800) 424-8802.
J. T. Baker NEUTRASORB® or TEAM® ‘Low Na+’ acid neutralizers are
recommended for spills of this product.
7. Handling and Storage
Store in a cool, dry, ventilated storage area with acid resistant floors and
good drainage. Protect from physical damage. Keep out of direct sunlight
and away from heat, water, and incompatible materials. Do not wash out
container and use it for other purposes. When diluting, the acid should
always be added slowly to water and in small amounts. Never use hot
water and never add water to the acid. Water added to acid can cause
uncontrolled boiling and splashing. Containers of this material may be
hazardous when empty since they retain product residues (vapors, liquid);
observe all warnings and precautions listed for the product.
8. Exposure Controls/Personal Protection
Airborne Exposure Limits:
-OSHA Permissible Exposure Limit (PEL):
2 ppm (TWA), 4 ppm (STEL)
-ACGIH Threshold Limit Value (TLV):
2 ppm (TWA); 4 ppm (STEL)
Ventilation System:
A system of local and/or general exhaust is recommended to keep
employee exposures below the Airborne Exposure Limits. Local exhaust
ventilation is generally preferred because it can control the emissions of
the contaminant at its source, preventing dispersion of it into the general
work area. Please refer to the ACGIH document, Industrial Ventilation, A

Manual of Recommended Practices, most recent edition, for details.
Personal Respirators (NIOSH Approved):
If the exposure limit is exceeded, wear a supplied air, full-facepiece
respirator, airlined hood, or full-facepiece self-contained breathing
apparatus. Nitric acid is an oxidizer and should not come in contact with
cartridges and canisters that contain oxidizable materials, such as activated
charcoal. Canister-type respirators using sorbents are ineffective.
Skin Protection:
Wear impervious protective clothing, including boots, gloves, lab coat,
apron or coveralls, as appropriate, to prevent skin contact.
Eye Protection:
Use chemical safety goggles and/or a full face shield where splashing is
possible. Maintain eye wash fountain and quick-drench facilities in work
area.
9. Physical and Chemical Properties
Appearance:
Colorless to yellowish liquid.
Odor:
Suffocating, acrid.
Solubility:
Infinitely soluble.
Specific Gravity:
1.41
pH:
1.0 (0.1M solution)
% Volatiles by volume @ 21C (70F):
100 (as water and acid)
Boiling Point:
122C (252F)
Melting Point:
-42C (-44F)
Vapor Density (Air=1):
2-3
Vapor Pressure (mm Hg):
48 @ 20C (68F)
Evaporation Rate (BuAc=1):
No information found.
10. Stability and Reactivity
Stability:
Stable under ordinary conditions of use and storage. Containers may burst
when heated.

Hazardous Decomposition Products:
When heated to decomposition, emits toxic nitrogen oxides fumes and
hydrogen nitrate. Will react with water or steam to produce heat and toxic
and corrosive fumes.
Hazardous Polymerization:
Will not occur.
Incompatibilities:
A dangerously powerful oxidizing agent, concentrated nitric acid is
incompatible with most substances, especially strong bases, metallic
powders, carbides, hydrogen sulfide, turpentine, and combustible organics.
Conditions to Avoid:
Light and heat.
11. Toxicological Information
Nitric acid: Inhalation rat LC50: 244 ppm (NO2)/30M; Investigated as a
mutagen, reproductive effector. Oral (human) LDLo: 430 mg/kg.
——–\Cancer Lists\———————————————–
——-
—NTP Carcinogen—
Ingredient Known Anticipated IARC
Category
———————————— —– ———– ——
——-
Nitric Acid (7697-37-2) No No
None
Water (7732-18-5) No No
None
12. Ecological Information
Environmental Fate:
No information found.
Environmental Toxicity:
No information found.
13. Disposal Considerations
Whatever cannot be saved for recovery or recycling should be managed in
an appropriate and approved waste facility. Although not a listed RCRA
hazardous waste, this material may exhibit one or more characteristics of a
hazardous waste and require appropriate analysis to determine specific
disposal requirements. Processing, use or contamination of this product
may change the waste management options. State and local disposal
regulations may differ from federal disposal regulations. Dispose of

container and unused contents in accordance with federal, state and local
requirements.
14. Transport Information
Domestic (Land, D.O.T.)
———————–
Proper Shipping Name: NITRIC ACID (WITH NOT MORE THAN
70% NITRIC ACID)
Hazard Class: 8
UN/NA: UN2031
Packing Group: II
Information reported for product/size: 150LB
International (Water, I.M.O.)
—————————–
Proper Shipping Name: NITRIC ACID (WITH NOT MORE THAN
70% NITRIC ACID)
Hazard Class: 8
UN/NA: UN2031
Packing Group: II
Information reported for product/size: 150LB
International (Air, I.C.A.O.)
—————————–
Proper Shipping Name: NITRIC ACID (WITH NOT MORE THAN
70% NITRIC ACID)
Hazard Class: 8
UN/NA: UN2031
Packing Group: II
Information reported for product/size: 150LB
15. Regulatory Information
——–\Chemical Inventory Status – Part 1\————————-
——–
Ingredient TSCA EC Japan
Australia
———————————————– —- — —– —
——-
Nitric Acid (7697-37-2) Yes Yes Yes
Yes
Water (7732-18-5) Yes Yes Yes
Yes
——–\Chemical Inventory Status – Part 2\————————-
——–

–Canada–
Ingredient Korea DSL NDSL
Phil.
———————————————– —– — —- –
—-
Nitric Acid (7697-37-2) Yes Yes No
Yes
Water (7732-18-5) Yes Yes No
Yes
——–\Federal, State & International Regulations – Part 1\——–
——–
-SARA 302- ——SARA
313——
Ingredient RQ TPQ List
Chemical Catg.
—————————————– — —– —- ——
——–
Nitric Acid (7697-37-2) 1000 1000 Yes
No
Water (7732-18-5) No No No
No
——–\Federal, State & International Regulations – Part 2\——–
——–
-RCRA- –
TSCA-
Ingredient CERCLA 261.33 8(d)
—————————————– —— —— —–

Nitric Acid (7697-37-2) 1000 No No
Water (7732-18-5) No No No
Chemical Weapons Convention: No TSCA 12(b): No CDTA: No
SARA 311/312: Acute: Yes Chronic: Yes Fire: Yes Pressure: No
Reactivity: No (Mixture / Liquid)
Australian Hazchem Code: 2PE
Poison Schedule: S6
WHMIS:
This MSDS has been prepared according to the hazard criteria of the
Controlled Products Regulations (CPR) and the MSDS contains all of the
information required by the CPR.
16. Other Information
NFPA Ratings: Health: 3 Flammability: 0 Reactivity: 0 Other: Oxidizer
Label Hazard Warning:
POISON! DANGER! STRONG OXIDIZER. CONTACT WITH OTHER
MATERIAL MAY CA– USE FIRE. CORROSIVE. LIQUID AND MIST

CA– USE SEVERE BURNS TO ALL BODY TISSUE. MAY BE FATAL
IF SWALLOWED OR INHALED. INHALATION MAY CA– USE LUNG
AND TOOTH DAMAGE.
Label Precautions:
Do not get in eyes, on skin, or on clothing.
Do not breathe vapor or mist.
Use only with adequate ventilation.
Wash thoroughly after handling.
Keep from contact with clothing and other combustible materials.
Do not store near combustible materials.
Store in a tightly closed container.
Remove and wash contaminated clothing promptly.
Label First Aid:
In case of contact, immediately flush eyes or skin with plenty of water for
at least 15 minutes while removing contaminated clothing and shoes.
Wash clothing before reuse. If swallowed, DO NOT INDUCE
VOMITING. Give large quantities of water. Never give anything by
mouth to an unconscious person. If inhaled, remove to fresh air. If not
breathing, give artificial respiration. If breathing is difficult, give oxygen.
In all cases get medical attention immediately.
Product Use:
Laboratory Reagent.
Revision Information:
MSDS Section(s) changed since last revision of document include: 3.
Disclaimer:
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Mallinckrodt Baker, Inc. provides the information contained herein in
good faith but makes no representation as to its comprehensiveness or
accuracy. This document is intended only as a guide to the
appropriate precautionary handling of the material by a properly
trained person using this product. Individuals receiving the
information must exercise their independent judgment in determining
its appropriateness for a particular purpose. MALLINCKRODT
BAKER, INC. MAKES NO REPRESENTATIONS OR
WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING
WITHOUT LIMITATION ANY WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE WITH RESPECT TO THE INFORMATION SET
FORTH HEREIN OR THE PRODUCT TO WHICH THE
INFORMATION REFERS. ACCORDINGLY, MALLINCKRODT
BAKER, INC. WILL NOT BE RESPONSIBLE FOR DAMAGES
RESULTING FROM — USE OF OR RELIANCE UPON THIS
INFORMATION.
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Prepared by: Environmental Health & Safety
Phone Number: (314) 654-1600 (U.S.A.)