Molekula
Chromotropic acid disodium salt dihydrate
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 disodium salt dihydrate is a sulfonated organic compound used in analytical chemistry and dye synthesis. It serves as a reagent in the detection of certain metal ions and in the production of specialty dyes. Available in powder form, it is stable at ambient temperatures. CAS: 5808-22-0, Molecular Formula: C10H10Na2O10S2, Molecular Weight: 400.29 g/mol, Storage: Ambient, Signal Word: Warning. Molekula supplies Chromotropic acid disodium salt dihydrate 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.
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25 g — £51.40 per pack ex VAT · £61.68 inc. VAT
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Specifications
| Property | Value |
|---|---|
| Appearance | White to grey, beige or brown powder |
| Loss on Drying | <10.0% |
| Assay (Anhydrous) | ⩾ 97.0% |
| Identification (IR) | Conforms to Reference |
| Aqueous solubility | Very soluble |
| Sensitivity to Formaldehyde | Pass |
| Sensitivity to Nitrate | Pass |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 25454876 |
| CAS Number | 5808-22-0 |
| IUPAC Name | disodium;4,5-dihydroxynaphthalene-2,7-disulfonate;dihydrate |
| Molecular Formula | C10H10Na2O10S2 |
| Molecular Weight | 400.29 |
| Exact Mass | 399.9511 |
| SMILES | C1=C2C=C(C=C(C2=C(C=C1S(=O)(=O)[O-])O)O)S(=O)(=O)[O-].O.O.[Na+].[Na+] |
| InChIKey | QUEAKWJKJBFNEG-UHFFFAOYSA-L |
| InChI | InChI=1S/C10H8O8S2.2Na.2H2O/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);;;2*1H2/q;2*+1;;/p-2 |
| PubChem CID | 2723846 |
| REACH Code | Y113 |
| HTS Code | 29089990 |
| 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
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P264 Wash thoroughly after handling
- P271 Use only outdoors or in a well-ventilated area
- 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
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
- 2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-, disodium salt, dihydrate
- 2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-, sodium salt, hydrate (1:2:2)
- 4,5-Dihydroxynaphthalene-2,7-disulfonic acid disodium salt dihydrate
- 4.5-Dihydroxy-2.7-naphthalene disulfonic acid disodium salt
- Chromotr
- Chromotropic acid disodium dihydrate
- Disodium 4,5-dihydroxynaphthalene-2,7-disulfonate Dihydrate
- Disodium chromotropate dihydrate
- Disodium Chromotropate Dihydrate (Technical Grade)
- Sodium 4,5-dihydroxynaphthalene-2,7-disulfonate dihydrate
Frequently asked questions
What is Chromotropic acid disodium salt dihydrate used for?
It is primarily used as a reagent in analytical chemistry, particularly in the detection and quantification of certain metal ions and in dye synthesis.
What is the chemical formula and molecular weight?
The formula is C10H10Na2O10S2 with a molecular weight of 400.29 g/mol.
How should Chromotropic acid disodium salt dihydrate be stored?
It should be stored at ambient temperature, protected from moisture and light.
What grade is available?
Available in analytical grade for laboratory use.
Can Molekula supply it in bulk?
Yes, Molekula can supply Chromotropic acid disodium salt dihydrate in bulk quantities—please contact sales for details.
What documentation comes with the order?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) with the shipment.
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.