Molekula
Chrome Azurol S
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
Chrome Azurol S is a chromogenic reagent used in analytical chemistry for detecting metal ions, particularly aluminum and iron. It forms colored complexes with these ions, enabling spectrophotometric analysis. Laboratories also use it as a reagent for the spectrophotometric determination of beryllium. Available in powder form with a molecular formula of C23H13Cl2Na3O9S, molecular weight of 605.28 g/mol, and stored at ambient temperatures. CAS number: 1667-99-8. Signal word: Warning. Molekula supplies Chrome Azurol 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
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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Specifications
| Property | Value |
|---|---|
| Appearance | brownish black powder |
| Loss on Drying | ≤10% |
| Solubility | Soluble in water |
| Specific absorptivity | 200 - 300 |
| Absorption maxima | 424 – 428 nm |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 67939734 |
| CAS Number | 1667-99-8 |
| IUPAC Name | trisodium;5-[(3-carboxy-5-methyl-4-oxocyclohexa-2,5-dien-1-ylidene)-(2,6-dichloro-3-sulfonatophenyl)methyl]-3-methyl-2-oxidobenzoate |
| Molecular Formula | C23H13Cl2Na3O9S |
| Molecular Weight | 605.28 |
| Exact Mass | 603.935 |
| SMILES | CC1=CC(=CC(=C1[O-])C(=O)[O-])C(=C2C=C(C(=O)C(=C2)C(=O)O)C)C3=C(C=CC(=C3Cl)S(=O)(=O)[O-])Cl.[Na+].[Na+].[Na+] |
| InChIKey | FUIZKNBTOOKONL-UHFFFAOYSA-K |
| InChI | InChI=1S/C23H16Cl2O9S.3Na/c1-9-5-11(7-13(20(9)26)22(28)29)17(12-6-10(2)21(27)14(8-12)23(30)31)18-15(24)3-4-16(19(18)25)35(32,33)34;;;/h3-8,26H,1-2H3,(H,28,29)(H,30,31)(H,32,33,34);;;/q;3*+1/p-3 |
| PubChem CID | 54736314 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 32129000 |
| Tariff Code | 3212900000 |
Safety & GHS
-
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
- 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
Documents
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
- C.I. Mordant Blue 29
- Chrome Azurol
- Mordant Blue 29
Frequently asked questions
What is Chrome Azurol S primarily used for?
Chrome Azurol S is commonly used as a pH indicator in analytical chemistry, particularly for detecting metal ions like aluminum, zinc, and magnesium in titrations.
What is the chemical formula and molecular weight of Chrome Azurol S?
The chemical formula is **C₂₃H₁₃Cl₂Na₃O₉S**, and the molecular weight is **605.28 g/mol**.
How should Chrome Azurol S be stored?
Store Chrome Azurol S at **ambient temperature** in a tightly sealed container, away from moisture and direct sunlight.
What purity grade is available for Chrome Azurol S?
Molekula supplies Chrome Azurol S in **analytical reagent (AR) grade** for high-precision applications.
Can Molekula supply Chrome Azurol S in bulk quantities?
Yes, we offer bulk packaging options for Chrome Azurol S—please contact our sales team for specific quantities and pricing.
What documentation comes with a Chrome Azurol S order?
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.