Molekula
Alizarin Red S (C.I. 58005)
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
Alizarin Red S (C.I. 58005) is a sodium salt dye used primarily as a pH indicator and in biological staining. It appears as a red crystalline powder and is soluble in water. CAS: 130-22-3, Molecular Formula: C14H7O7SNa, Molecular Weight: 342.26 g/mol. Store at ambient temperature. Signal word: Warning. Molekula supplies Alizarin Red S 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.
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.
-
25 g — £36.70 per pack ex VAT · £44.04 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 | Brownish yellow powder |
| Loss on Drying | <5% |
| Solubility in water | Clear Solution |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Melting Point | 283 °C |
Source: PubChem CID 3955344 (PAC Chemical Database)
Identification
| Property | Value |
|---|---|
| SKU | 20575144 |
| CAS Number | 130-22-3 |
| IUPAC Name | sodium 3,4-dihydroxy-9,10-dioxoanthracene-2-sulfonate |
| EC Number | 204-981-8 |
| Molecular Formula | C14H7O7SNa |
| Molecular Weight | 342.26 |
| Exact Mass | 341.981 |
| SMILES | C1=CC=C2C(=C1)C(=O)C3=CC(=C(C(=C3C2=O)O)O)S(=O)(=O)[O-].[Na+] |
| InChIKey | HFVAFDPGUJEFBQ-UHFFFAOYSA-M |
| InChI | InChI=1S/C14H8O7S.Na/c15-11-6-3-1-2-4-7(6)12(16)10-8(11)5-9(22(19,20)21)13(17)14(10)18;/h1-5,17-18H,(H,19,20,21);/q;+1/p-1 |
| PubChem CID | 3955344 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 3204124500 |
| Tariff Code | 3204120090 |
Safety & GHS
Precautionary statements
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, 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
- Acid Red Alizarine
- Alizarin S
- alizarine carmine
- Alizarine Red A
- Alizarine Red W
- C.I. 58005
- C.I. Mordant Red 3
- Diamond Red W
- Mordant Red 3
- Sodium alizarinesulfonate
Frequently asked questions
What is Alizarin Red S used for?
Alizarin Red S is primarily used as a pH indicator in analytical chemistry and as a dye in biological staining applications.
What is the chemical formula and molecular weight of Alizarin Red S?
The formula is C14H7O7SNa with a molecular weight of 342.26 g/mol.
How should Alizarin Red S be stored?
It should be stored at ambient temperature, protected from moisture and light.
What grade of Alizarin Red S is available?
Molekula supplies Alizarin Red S in analytical grade.
Can Molekula supply Alizarin Red S in bulk?
Yes, Molekula can supply Alizarin Red S in bulk quantities upon request.
What documentation comes with an order of Alizarin Red S?
Each order includes a Certificate of Analysis and Safety Data Sheet (SDS).
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.