Citric AcidCitric Acid
Anhydrous · Monohydrate citric acid
Anhydrous citric acid CAS No. 77-92-9
Citric acid monohydrate CAS No. 5949-29-1
Citric acid has different CAS numbers depending on its form. Let us know whether you need anhydrous or monohydrate material so we can confirm product specifications and supply terms.
Different forms have different
CAS numbers
Citric acid is an organic acid used in pH adjustment, cleaning and chelation. Anhydrous and monohydrate forms have different formulas and CAS numbers.
Tell us the required hydrate form and grade before ordering or use, and we will check the documentation for the actual supplied product.
CAS numbers and basic information by form
A single CAS number cannot be assigned to unspecified citric acid. Confirm the hydrate form of the product to be supplied.
| Anhydrous citric acid | CAS No. 77-92-9Formula C₆H₈O₇ |
|---|---|
| Citric acid monohydrate | CAS No. 5949-29-1Formula C₆H₈O₇·H₂O |
| Common solid forms | White crystals or powder |
| Details to confirm | Hydrate form, grade, particle size, packaging and quantity |
Each number identifies a particular form. We will confirm available forms and their MSDS individually.
Tell us the form you need
Tell us whether you need anhydrous or monohydrate citric acid, your application, grade, particle size, quantity and delivery location. We will check supply conditions.
Enquire about citric acidDetails for your enquiry
- 01Requested form: anhydrous or monohydrate citric acid
- 02Application and required grade
- 03Quantity and delivery location
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Substance identity references
Names and CAS numbers for each form were checked against the corresponding PubChem substance pages on 2026-09-30.
These references identify general substances; they are not the MSDS, manufacturer or source of the product we supply.
The image illustrates a solid form. Specifications of the supplied product are confirmed individually.
View PubChem anhydrous citric acid, CAS 77-92-9 (new tab) ↗View PubChem citric acid monohydrate, CAS 5949-29-1 (new tab) ↗← All products