Phosphoric Acid 75%
CAS 7664-38-2 · Part MC-H3PO475 · Technical / Food grade available
Seventy-five percent phosphoric acid in technical and food grades. Metal prep, rust conversion, descaling, and acid cleaning where a milder acid is wanted.
Specification
- CAS number
- 7664-38-2
- Part number
- MC-H3PO475
- Grade
- Technical / Food grade available
- Physical form
- Liquid
- Assay / concentration
- 75% w/w
- Transport
- UN1805, Class 8, PG III
- Category
- Acids
- Also known as
- orthophosphoric acid, phos acid, H3PO4
Phosphoric acid at 75%, available in technical and food grades. Specify which when ordering.
Typical uses
- Iron and zinc phosphate conversion coatings before painting
- Rust removal and rust conversion
- Acid cleaning and descaling of stainless and mild steel
- Dairy and brewery CIP acid wash, at food grade
- Acidulant in food and beverage processing, at food grade
Why it is often chosen
Phosphoric acid is meaningfully less aggressive than sulfuric or hydrochloric — it is a weaker acid, it does not fume, and it leaves a passivating phosphate film on steel rather than continuing to attack it. That combination is exactly why it dominates metal prep before painting.
It is still corrosive and still requires proper PPE. Less aggressive is not the same as safe.
Documents
Available to account holders and sent the same business day. If you need documents routinely, ask us to attach them to your shipping paperwork automatically rather than requesting them one at a time.
Current revision, sixteen-section GHS format
Measured results for the lot you received
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.
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 |
| Nitric Acid 67% Technical, 42 Baumé | 7697-37-2 | 55 gal drum 5 gal carboy | SDS · CoA |
| Acetic Acid, Glacial Technical / Food grade available | 64-19-7 | 55 gal drum 5 gal pail | SDS · CoA |
If your approval process needs something that is not here, one email gets it.
Certificates, insurance, registrations, safety data sheets, and completed supplier questionnaires. Standard documents go out the same business day.