Chromazurol S

Name: Chromazurol S
Brand: Vaqora Chemicals
SKU: VQ-000330

About Chromazurol S

Chromazurol S is an indicator carrying the CAS registry number 1667-99-8. The compound has the formula C23H13Cl2Na3O9S, corresponding to a molecular weight of 605.3 g/mol. Common synonyms include Chromeazurol S and Chrome Azurol S.

It is supplied as a dark blue to very dark blue powder. Store in a tightly closed container in a cool, dry and well-ventilated place. It carries the GHS signal word “Warning” with 3 hazard statements. Review the Safety Data Sheet before use.

Typical applications include titration end-point detection, pH determination and analytical testing. It is used across academic and industrial research.

Vaqora Chemicals supplies Chromazurol S in 5 g, 10 g, 25 g and 100 g packs, each shipped with a Certificate of Analysis (COA), and exports worldwide. A Safety Data Sheet (SDS) and technical specifications are available on request.

Typical applications

Titration end-point detection
pH determination
Analytical testing

Industries

Specifications & identifiers

Chemical identifiers
Product name	Chromazurol S
Catalogue No.	VQ-000330
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	605.3 g/mol
Exact mass	603.935
HSN code	32049000
InChIKey	FUIZKNBTOOKONL-UHFFFAOYSA-K
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+]
PubChem CID	54736314

Physical properties
Physical form	Powder
Appearance	Dark blue to very dark blue powder
H-bond donors / acceptors	1 / 9
TPSA	183 Å²
Synonyms	Chromeazurol S, Chrome Azurol S, Mordant Blue 29, C.I. Mordant Blue 29, Chrome Azurol, Chromeazurol S, Dye content 50 %

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P261, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of Chromazurol S?

The CAS Registry Number of Chromazurol S is 1667-99-8. It is also known as Chromeazurol S, Chrome Azurol S, Mordant Blue 29.

What is the molecular formula and molecular weight of Chromazurol S?

Chromazurol S has the molecular formula C23H13Cl2Na3O9S and a molecular weight of 605.3 g/mol.

Which grade and pack sizes of Chromazurol S can I order?

We supply Chromazurol S, in 5 g, 10 g, 25 g, 100 g, 1 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Chromazurol S?

Yes. Every lot of Chromazurol S is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Chromazurol S be shipped internationally?

Yes. Chromazurol S is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.