Molekula
Indigo Carmine (C.I. 73015)
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
Indigo Carmine (C.I. 73015) is a bright blue synthetic dye widely used in food, pharmaceuticals, and textiles as a colorant and pH indicator. It appears as a deep blue, water-soluble powder with high stability under varying pH conditions. CAS 860-22-0, molecular formula C16H8N2Na2O8S2, molecular weight 466.35 g/mol, and requires ambient storage. The product carries a signal word of "Warning" per GHS classification. Molekula supplies Indigo Carmine 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.
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25 g — £21.70 per pack ex VAT · £26.04 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 | Indigo powder |
| Heavy metals | ≤40mg/kg |
| Loss on Drying | ≤0 - 15% |
| Dye Content | ≥80.0% |
| Cadmium (Cd) | ≤1mg/kg |
| Lead (Pb) | 0 - 2mg/kg |
| Mercury (Hg) | ≤1mg/kg |
| Arsenic (As) | ≤0 - 3mg/kg |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 48763027 |
| CAS Number | 860-22-0 |
| IUPAC Name | disodium;2-(3-hydroxy-5-sulfonato-1H-indol-2-yl)-3-oxoindole-5-sulfonate |
| EC Number | 212-728-8 |
| Molecular Formula | C16H8N2Na2O8S2 |
| Molecular Weight | 466.35 |
| Exact Mass | 465.9517 |
| SMILES | C1=CC2=C(C=C1S(=O)(=O)[O-])C(=C(N2)C3=NC4=C(C3=O)C=C(C=C4)S(=O)(=O)[O-])O.[Na+].[Na+] |
| InChIKey | JFVXEJADITYJHK-UHFFFAOYSA-L |
| InChI | InChI=1S/C16H10N2O8S2.2Na/c19-15-9-5-7(27(21,22)23)1-3-11(9)17-13(15)14-16(20)10-6-8(28(24,25)26)2-4-12(10)18-14;;/h1-6,17,19H,(H,21,22,23)(H,24,25,26);;/q;2*+1/p-2 |
| PubChem CID | 2723854 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 32129000 |
| Tariff Code | 3212900000 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H302 Harmful if swallowed
- H317 May cause an allergic skin reaction
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P333+313 IF skin irritation or a rash occurs: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, English (US), 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
- Acid Blue 74
- C.I. ACID BLUE 74
- C.I. Food Blue 1
- FD&C Blue No. 2
- Food Blue No. 2
- Indigo carmine
- Indigocarmin
- Indigotindisulfonate sodium
- Indigotine
- Sodium 3,3'-dioxo-[2,2'-biindolinylidene]-5,5'-disulfonate
Frequently asked questions
What is Indigo Carmine (C.I. 73015) commonly used for?
Indigo Carmine is primarily used as a blue food dye (E132) in beverages, pharmaceuticals, and cosmetics, as well as a pH indicator in laboratories.
What is the chemical formula and molecular weight of Indigo Carmine?
The formula is **C₁₆H₈N₂Na₂O₈S₂**, and the molecular weight is **466.35 g/mol**.
What safety classification does Indigo Carmine have, and how should it be stored?
The signal word is **Warning** (per GHS). Store in a cool, dry place at **ambient temperature**, protected from light.
Does Molekula supply Indigo Carmine in bulk quantities?
Yes, we offer Indigo Carmine in bulk (minimum order quantities vary—contact us for details).
What documentation is provided with an order of Indigo Carmine?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** for traceability.
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.