Phosphoric acid, also known as orthophosphoric acid, is a weak triprotic acid. At 85%, it is a colorless and odorless viscous liquid. The most common usage is in fertilizers, accounting for more than 75% of its use. It is also a useful pH modifier, sanitizing agent, and rust converter. The ACS monogram for phosphoric acid signifies high purity.
Phosphoric Acid 85% Solution, ACS Grade is orthophosphoric acid, a weak triprotic acid with CAS 7664-38-2. It has an assay of 85.0% min. and comes as a liquid. At this strength it’s a colorless, odorless, viscous liquid. The ACS monogram for phosphoric acid signals high purity, so this grade fits work where the quality of your acid matters. You don’t have to hunt for paperwork. The Product Manuals tab lists the Safety Data Sheet, Technical Data Sheet, Allergen Statement, BPA Statement, PFAS/PFOS Free Statement, TSE/BSE Declaration, Non Irradiation Statement and Manufacturing Process Flow Chart. Certificates of Analysis for several lots are listed there too.
The most common use is fertilizers, and you’ll also find phosphoric acid as an acidifying agent in foods, beverages, cosmetics and skin care products, as a pH modifier and as a rust converter. Whatever you’re doing with it, a few problems can slow you down: missing paperwork, the wrong container size, or a supplier who can’t ship hazmat. Lab Alley covers all three. Documents are available online, sizes run from 500ml up to 55 gallons, and hazmat shipping is handled from start to finish. Here’s the simple plan. Choose your size, set up Autoship if you reorder often, or request a quote for bigger volumes. It all comes together on budget, on time, every time. Request a quote here and we’ll take it from there.
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Fertilizer manufacturing
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Acidifying agent in cosmetics and skin care
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Acidifying agent in foods and beverages
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pH adjustment
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Rust converter
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Dental cleaning applications
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Q: What is Phosphoric Acid 85% Solution, ACS Grade used for?
A: Its most common use is fertilizers. It’s also used as an acidifying agent in foods, beverages, cosmetics and skin care products, as a pH modifier and as a rust converter.Q: What does ACS Grade mean, and is it suitable for fertilizer work?
A: ACS Grade means the ACS monogram applies, which signals high purity. Whether it fits your fertilizer process depends on your own specification, so check the Technical Data Sheet or ask us.Q: What sizes are available, and does it ship as hazmat?
A: You can order 500ml, 1L, 1 gallon, 4L, 5 gallon and 55 gallon sizes, plus cases of 6 x 500ml, 4 x 1L, 4 x 1 gallon and 4 x 4L. Yes, it ships as hazmat. The DOT line reads: DOT: Phosphoric acid, solution, 8, UN1805, PG III.Q: How do I get the SDS and Certificate of Analysis?
A: Both are listed on this page under Product Manuals, with the Certificates of Analysis in their own sub tab. If you can’t find the lot you need, contact us and we’ll send it.Q: How should phosphoric acid be stored?
A: Our guide on how to store phosphoric acid walks through it. Your Safety Data Sheet has the handling details for this product.Q: What is the assay of this product?
A: The assay is 85.0% min. It’s sold as a liquid solution.Q: How is this different from other phosphoric acid on the site?
A: This listing is the 85% ACS Grade solution. Our Types of Phosphoric Acid post explains how the options differ, and you can browse the full phosphoric acid category.
Product Information
| CAS | 7664-38-2 |
|---|---|
| Assay | 85.0% min. |
| PubChem ID | 1004 |
| Grade | ACS Grade |
| Color | Max 10 |
| Physical form | Liquid |
| Appearance | Colorless |
| Odor | Odorless |
| pH | < 0.5 at 100 g/l at 20 °C (68 °F) |
| Melting point | ca.21 °C (ca.70 °F) |
| Boiling Point | ca.158 °C ca.316 °F at 1,013 hPa |
| Vapor pressure | 2 hPa at 20 °C (68 °F) |
| Density | 1.71 g/cm³ at 20 °C (68 °F) |
| Solubility | Miscible |
| Molecular formula | H3PO4 |
| Molecular weight | 97.995 |
| Arsenic (As) | 1 ppm Max. |
| Autoship Available | Yes |
| Calcium (Ca) | 0.002% Max |
| Chloride (Cl) | 3 ppm Max. |
| Heavy metals | 0.001% Max. |
| Insoluble matter | 0.001% Max. |
| Iron (Fe) | 0.003% Max |
| Magnesium (Mg) | 0.002% Max |
| Nitrate (NO3) | 5 ppm Max. |
| Pillar | High Purity |
| Reducing Substances | Passes Test |
| Sodium (Na) | 0.025% Max. |
| Sulfate (SO4) | 0.003% Max |
| Viscosity | 30.5 mm2/s at 20 °C (68 °F) |
