Molekula
Citric acid anhydrous
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Citric acid anhydrous is a white crystalline powder used as a pH adjuster, chelating agent, and acidulant in food, pharmaceuticals, and industrial applications. It has a CAS number of 77-92-9, molecular formula C6H8O7, and a molecular weight of 192.12 g/mol. Stored at ambient temperatures, it carries a warning signal word due to potential irritation. Molekula supplies citric acid anhydrous from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Often bought together
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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500 g — £20.00 per pack ex VAT · £24.00 inc. VAT
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1 kg — £24.80 per pack ex VAT · £29.76 inc. VAT
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5 kg — £67.00 per pack ex VAT · £80.40 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Colourless crystals or white crystalline powder |
| Water | ≤0.2% |
| Heavy metals | ≤1ppm |
| Identification | Conforms to reference |
| Odour | Odourless |
| Colour | ≥98.00% (50% w/v; 405nm 1cm cell) |
| Assay | ≥99.80% |
| Chlorides | ≤5ppm |
| Iron (Fe) | ≤1ppm |
| Lead (Pb) | ≤0.5ppm |
| Mercury (Hg) | ≤1ppm |
| Arsenic (As) | ≤1ppm |
| Calcium (Ca) | ≤10ppm |
| Copper (Cu) | ≤1ppm |
| Magnesium (Mg) | ≤1ppm |
| Barium (Ba) | ≤1ppm |
| Zinc (Zn) | ≤1ppm |
| Aluminium (Al) | ≤0.2ppm |
| Sulphates (SO4)(2-) | ≤30ppm |
| Oxalate (Oxalic acid) | ≤10ppm |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Colorless, translucent crystals or powder |
| Odour | Odorless |
| Melting Point | 153 °C |
| Density | 1.665 g/cm³ at 20 °C |
| Water Solubility | 383 g/L at 25 °C |
| Solubility (other solvents) | Very soluble in ethanol; soluble in ether, ethyl acetate; insoluble in benzene, chloroform |
| Refractive Index | 1.493 |
| pKa | pKa = 2.79 |
| log P (octanol/water) | -1.64 |
Source: PubChem CID 311 (HSDB, DrugBank)
Identification
| Property | Value |
|---|---|
| SKU | 34135032 |
| CAS Number | 77-92-9 |
| IUPAC Name | 2-hydroxypropane-1,2,3-tricarboxylic acid |
| EC Number | 201-069-1 |
| Molecular Formula | HOC(COOH)(CH2COOH)2 |
| Molecular Weight | 192.12 |
| Exact Mass | 192.027 |
| SMILES | C(C(=O)O)C(CC(=O)O)(C(=O)O)O |
| InChIKey | KRKNYBCHXYNGOX-UHFFFAOYSA-N |
| InChI | InChI=1S/C6H8O7/c7-3(8)1-6(13,5(11)12)2-4(9)10/h13H,1-2H2,(H,7,8)(H,9,10)(H,11,12) |
| PubChem CID | 311 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 29181400 |
| Tariff Code | 2918140090 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
- USH01 May form combustible dust concentrations in air
Precautionary statements
- P210 Keep away from heat/sparks/open flames/hot surfaces - No smoking
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P337+313 If eye irritation persists get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- 1,2,3-Propanetricarboxylic acid, 2-hydroxy-
- 2-hydroxy-1,2,3-propanetricarboxylic acid
- 2-hydroxypropane-1,2,3-tricarboxylic acid
- Aciletten
- Anhydrous citric acid
- Chemfill
- Citretten
- citric acid
- Citro
- Hydrocerol A
Frequently asked questions
What is citric acid anhydrous used for?
It is commonly used as a pH adjuster, chelating agent, and acidulant in food, pharmaceuticals, and cleaning products.
What is the chemical formula and molecular weight of citric acid anhydrous?
The formula is C6H8O7 and the molecular weight is 192.12 g/mol.
How should citric acid anhydrous be stored?
Store at ambient temperature in a dry, well-ventilated area away from incompatible materials.
What grade of citric acid anhydrous is available?
Available in food grade and technical grade; please specify your application when ordering.
Can Molekula supply citric acid anhydrous in bulk?
Yes, bulk quantities are available—contact our sales team for pricing and availability.
What documentation comes with a purchase of citric acid anhydrous?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) upon request.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.