Nitric acid

CAS 7697-37-2 HNO₃ MW 63.0000 Danger 3 SDS documents available OSHA PEL listed NIOSH data available

Flame Over Circle

Corrosion

Skull and Crossbones

Health Hazard

Emergency: 911 | Poison Control: 1-800-222-1222

Safety Data Sheets

Manufacturer	Download
Acros Organics	Download PDF
Alfa Aesar	Download PDF
Sigma Aldrich	Download PDF

Recommended safety equipment

Personal protective equipment commonly recommended for the hazard classes shown above.

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Hazard Statements

Code	Statement	Hazard Class
`H272`	May intensify fire; oxidizer	Oxidizing liquids; Oxidizing solids
`H290`	May be corrosive to metals	Corrosive to Metals
`H314`	Causes severe skin burns and eye damage	Skin corrosion/irritation
`H318`	Causes serious eye damage	Serious eye damage/eye irritation
`H330`	Fatal if inhaled	Acute toxicity, inhalation
`H370`	Causes damage to organs	Specific target organ toxicity, single exposure
`H372`	Causes damage to organs through prolonged or repeated exposure	Specific target organ toxicity, repeated exposure
`H402`	Harmful to aquatic life	Hazardous to the aquatic environment, acute hazard

Precautionary Statements

Code	Statement
`P210`	Keep away from heat, hot surface, sparks, open flames and other ignition sources. No smoking.
`P220`	Keep away from clothing and other combustible materials.
`P234`	Keep only in original container.
`P260`	Do not breathe dust/fume/gas/mist/vapors/spray.
`P264`	Wash hands [and ...] thoroughly after handling.
`P264+P265`	Wash hands [and ...] thoroughly after handling. Do not touch eyes.
`P270`	Do not eat, drink or smoke when using this product.
`P271`	Use only outdoors or in a well-ventilated area.
`P273`	Avoid release to the environment.
`P280`	Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/...
`P284`	[In case of inadequate ventilation] Wear respiratory protection.
`P301+P330+P331`	IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
`P302+P361+P354`	IF ON SKIN: Take off Immediately all contaminated clothing. Immediately rinse with water for several minutes.
`P304+P340`	IF INHALED: Remove person to fresh air and keep comfortable for breathing.
`P305+P354+P338`	IF IN EYES: Immediately rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing.
`P308+P316`	IF exposed or concerned: Get emergency medical help immediately.
`P316`	Get emergency medical help immediately.
`P317`	Get emergency medical help.
`P319`	Get medical help if you feel unwell.
`P320`	Specific treatment is urgent (see ... on this label).
`P321`	Specific treatment (see information on this label and safety datasheet)).
`P363`	Wash contaminated clothing before reuse.
`P370+P378`	In case of fire: Use ... to extinguish.
`P390`	Absorb spillage to prevent material damage.
`P403+P233`	Store in a well-ventilated place. Keep container tightly closed.
`P405`	Store locked up.
`P406`	Store in corrosive resistant/... container with a resistant inner liner.
`P501`	Dispose of contents/container to ...

Exposure Limits

OSHA PEL	2 ppm
NIOSH REL	2 ppm
NIOSH STEL	4 ppm
NIOSH IDLH	25 ppm
Skin Notation	Yes — can be absorbed through skin

Physical Properties

Colorless, yellow, or red, fuming liquid with an acrid, suffocating odor.

Boiling Point	181°F
Vapor Pressure	48 mmHg
Specific Gravity	1.5

NFPA 704 Diamond

Target Organs

Lungs

dental erosion, nasal and lung irritation

Synonyms

aqua fortis; spirit of niter; engravers acid; white fuming nitric acid (WFNA); red fuming nitric acid (RFNA); hydrogen nitrate

Data Sources

GHS Classification: PubChem CID 944
OSHA PEL: OSHA Occupational Chemical Database
NIOSH REL/IDLH: NIOSH Pocket Guide

Disclaimer: This information is compiled from public regulatory databases for reference only. It does not replace the manufacturer's Safety Data Sheet (SDS). Always consult the official SDS for your specific product before handling chemicals.

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