Molekula
Chromotropic Acid
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
Chromotropic Acid is a sulfonic acid derivative used in analytical chemistry for the detection and quantification of certain metal ions and in the synthesis of dyes and pharmaceuticals. It appears as a yellow crystalline powder with a molecular formula of C10H8O8S2 and a molecular weight of 320.298 g/mol. It is stable at ambient temperatures and should be handled with care due to its warning signal word. Molekula supplies Chromotropic Acid 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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100 g — $532.00 per pack
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 | brown to grey powder |
| Assay | ≥70% |
| Purity | ≥98% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 90027786 |
| CAS Number | 148-25-4 |
| IUPAC Name | 4,5-dihydroxynaphthalene-2,7-disulfonic acid |
| EC Number | 205-712-7 |
| Molecular Formula | C10H8O8S2 |
| Molecular Weight | 320.298 |
| Exact Mass | 319.9661 |
| SMILES | C1=C2C=C(C=C(C2=C(C=C1S(=O)(=O)O)O)O)S(=O)(=O)O |
| InChIKey | HLVXFWDLRHCZEI-UHFFFAOYSA-N |
| InChI | InChI=1S/C10H8O8S2/c11-8-3-6(19(13,14)15)1-5-2-7(20(16,17)18)4-9(12)10(5)8/h1-4,11-12H,(H,13,14,15)(H,16,17,18) |
| PubChem CID | 67221 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 29089900 |
| Tariff Code | 2908990000 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P260 Do not breathe 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
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P308+313 IF exposed or concerned: Get medical advice/attention
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
- 1,8-dihydroxynaphthalene-3,6-disulfonic acid
- 1,8-Dihydroxynaphthylene-3,6-disulfonic acid
- 2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-
- 4,5-Dihydroxy-2,7-naphthalenedisulfonic acid
- 4,5-dihydroxynaphthalene-2,7-disulfonic acid
- 4,5-Dihydroxynaphthalene-2,7-disulphonic acid
- C.I. 16655
- doi:10.14272/HLVXFWDLRHCZEI-UHFFFAOYSA-N.1
Frequently asked questions
What is Chromotropic Acid used for?
Chromotropic Acid is primarily used in analytical chemistry for the detection and quantification of certain metal ions, particularly in spectrophotometric assays.
What is the chemical formula and molecular weight of Chromotropic Acid?
The formula is C10H8O8S2 with a molecular weight of 320.298 g/mol.
How should Chromotropic Acid be stored?
It should be stored at ambient temperature, protected from moisture and light.
What grade of Chromotropic Acid does Molekula supply?
Molekula supplies Chromotropic Acid in analytical grade.
Can Molekula supply Chromotropic Acid in bulk quantities?
Yes, Molekula can supply Chromotropic Acid in bulk quantities—please contact our sales team for volume pricing and availability.
What documentation comes with a Chromotropic Acid order?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS), compliant with GHS standards.
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.