CAS 7697-37-2

Nitric acid

硝酸

HNO3MW 63.013 g/molHS 280800 UN2031 · Class 8

From the buying desk

Commercial grades run from about 55% to 68%, and fuming grades go higher. Strength decides the transport entry: at 65% and above it also carries an oxidizer subsidiary risk, so confirm the packing group on the SDS for the exact strength you buy. It is also an explosives precursor under the rules of several countries, so expect end use paperwork from the factory.

Import Card

Before you order nitric acid from China, see its register listing, the duty, anti dumping cases and a supplier check on one card, each with its source and date.

Card for the US Card for Australia

Identifiers

Synonyms
Aqua fortis, Hydrogen nitrate
Formula
HNO3
Molecular weight
63.013 g/mol
SMILES
[N+](=O)(O)[O-]
InChIKey
GRYLNZFGIOXLOG-UHFFFAOYSA-N
HS code (6-digit)
280800

Transport and hazard profile

Transport classification, UN number UN2031, IMDG Class 8.

GHS hazard statements, Danger. H-codes, H272, H314, H330. Refer to the substance SDS Section 2 for the full classification.

US and Australian rules for Nitric acid

Read from the official lists by CAS 7697-37-2. Screening only: check the source before you ship, store or report.

California Prop 65

No entry

No entry for CAS 7697-37-2 in the OEHHA list dated July 31, 2026.

Open the tool · Official source

OSHA exposure limit

Listed

Table Z-1: 2 ppm, 5 mg/m³ as an 8 hour average.

Open the tool · Official source

Australian exposure standard

Listed

2 ppm, 5.2 mg/m³ as an 8 hour average, 4 ppm, 10 mg/m³ short term.

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CERCLA reportable quantity

Listed

Reportable quantity 1,000 lb (454 kg). A package holding this much needs RQ on the shipping paper.

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EPCRA Tier II threshold

Listed

An Extremely Hazardous Substance, so Tier II reporting starts at 500 lb on site.

Open the tool · Official source

Regulatory profile across 5 jurisdictions

Verified against ECHA, US EPA TSCA Inventory, MEE China IECSC, NIER K-REACH, and AICIS AIIC. Last verification 2026-04-30. Confirm with the regulator portal before any shipping decision.

EU REACH
Listed
US TSCA
Listed
China IECSC
Listed
Korea K-REACH
Listed
Australia AICIS
Listed

Look up other substances at the REACH / TSCA cross-jurisdiction checker.

Common applications

  • · Ammonium nitrate fertilizer
  • · Adipic acid and nylon intermediates
  • · Metal etching and pickling
  • · Nitration in dyes and explosives

Sourcing documentation chain

Every shipment of Nitric acid from China should include a per-batch COA, a current SDS per GB/T 17519 on the China side and the destination jurisdiction's standard on the import side, a packing list, a bill of lading, and a certificate of origin plus an MSA China DG packing certificate. For Incoterms reference see FOB, CIF, and CFR.

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Read next

Where this substance shows up across Sourzi

Referenced in

5 pages across the Sourzi moat

This term shows up in 5 regulatory pages. Sample backlinks per content type below.

Regulatory (5)

Plus 2 more regulatory pages.

Free download

Free PDF: the MSDS verification template Sourzi runs against the supplier sheet for every CAS number we book out of China.