Nitric Acid 67%
CAS 7697-37-2 · Part MC-HNO367 · Technical, 42 Baumé
Sixty-seven percent nitric acid for stainless passivation, bright dipping, and etching. Oxidising as well as corrosive — storage separation is not optional.
Specification
- CAS number
- 7697-37-2
- Part number
- MC-HNO367
- Grade
- Technical, 42 Baumé
- Physical form
- Liquid
- Assay / concentration
- 67–70% w/w
- Transport
- UN2031, Class 8, PG II
- Category
- Acids
- Also known as
- aqua fortis, 42 be, HNO3
Nitric acid at 67 to 70 percent, 42 Baumé.
Typical uses
- Passivation of stainless steel per ASTM A967 and AMS 2700
- Bright dipping and chemical polishing of copper and brass
- Etching in electronics and printing
- Stripping of certain plated deposits
- Analytical and laboratory use, at appropriate grade
Handling — read this one carefully
Nitric acid is both a strong acid and a strong oxidiser, which is a more dangerous combination than either property alone. Contact with organic material — wood, cloth, solvents, even a cardboard pallet soaked with it — can ignite.
Store on non-combustible surfaces with dedicated secondary containment. Do not store on or near wooden pallets. Do not use organic absorbents in a spill kit intended for nitric.
Use 304L or 316L stainless, glass, or PTFE. It attacks most other metals and all common elastomers.
Compatibility
Incompatible with organics, alcohols, acetic acid, reducing agents, and metal powders. Contact with hydrochloric acid produces aqua regia and nitrosyl chloride.
Documents
Safety data sheets and certificates are available to account holders. Request one below and we send it the same business day — or ask us to attach documents to every shipment automatically so you are not requesting them one at a time.
Read the sheet before the first use
Section 2 covers the hazards, Section 8 the protective equipment actually required, and Section 10 what this must not be stored next to. Storage incompatibility is the single most common cause of serious chemical incidents. How to read an SDS
More in Acids
| Product | CAS | Available as | Documents |
|---|---|---|---|
| Sulfuric Acid 93% Technical, 66 Baumé | 7664-93-9 | Bulk 275 gal tote 55 gal drum 5 gal carboy | SDS CoA |
| Hydrochloric Acid 31% Technical, 20 Baumé | 7647-01-0 | Bulk 275 gal tote 55 gal drum 5 gal carboy | SDS CoA |
| Citric Acid 50% Solution Food grade / USP | 77-92-9 | 275 gal tote 55 gal drum | SDS CoA |
| Phosphoric Acid 75% Technical / Food grade available | 7664-38-2 | 275 gal tote 55 gal drum 5 gal pail | SDS CoA |
| Acetic Acid, Glacial Technical / Food grade available | 64-19-7 | 55 gal drum 5 gal pail | SDS CoA |
Spill, release, or a container you cannot identify? The emergency line is answered 24 hours a day. Do not move an unknown container.
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