Cresol red solution

Name: Cresol red solution
Brand: Vaqora Chemicals
SKU: VQ-003536

About Cresol red solution

Cresol red solution is a diagnostic reagent carrying the CAS registry number 1733-12-6. The compound has the formula C21H18O5S, corresponding to a molecular weight of 382.4 g/mol. The IUPAC name is 4-[3-(4-hydroxy-3-methylphenyl)-1,1-dioxo-2,1lambda6-benzoxathiol-3-yl]-2-methylphenol. Common synonyms include o-Cresolsulfonphthalein Solution and Cresol red.

The material typically appears as a dark red liquid. Store sealed in a dry, well-ventilated location away from incompatible materials. The GHS classification uses the signal word “Warning”, so appropriate gloves, eye protection and ventilation are recommended.

It is commonly used for clinical chemistry, diagnostic assays and pathology laboratories. Typical end-use sectors are academic and industrial research and diagnostics and biotechnology.

Available in 125 mL, 10 x 125 mL and 25 L packs, Cresol red solution is dispatched with a Certificate of Analysis (COA) to destinations worldwide.

Typical applications

Clinical chemistry
Diagnostic assays
Pathology laboratories

Industries

Specifications & identifiers

Chemical identifiers
Product name	Cresol red solution
Catalogue No.	VQ-003536
CAS Number	1733-12-6
IUPAC name	4-[3-(4-hydroxy-3-methylphenyl)-1,1-dioxo-2,1lambda6-benzoxathiol-3-yl]-2-methylphenol
Molecular formula	C₂₁H₁₈O₅S
Molecular weight	382.4 g/mol
Exact mass	382.0875
HSN code	3822
InChIKey	OBRMNDMBJQTZHV-UHFFFAOYSA-N
SMILES	CC1=C(C=CC(=C1)C2(C3=CC=CC=C3S(=O)(=O)O2)C4=CC(=C(C=C4)O)C)O
PubChem CID	73013

Physical properties
Physical form	Solution
Appearance	Dark red liquid
LogP (XLogP3)	3.7
H-bond donors / acceptors	2 / 5
TPSA	92.2 Å²
Synonyms	o-Cresolsulfonphthalein Solution, Cresol red, o-Cresolsulfonphthalein, o-Cresol Red, Cresolsulfophthalein, o-Cresolsulfonephthalein, Phenol, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis[2-methyl-, 3',3''-Dimethylphenolsulfonephthalein, Phenol, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis(2-methyl-, 3,3-bis(4-hydroxy-3-methylphenyl)-3H-benzo[c][1,2]oxathiole 1,1-dioxide, Cresol red indicator, 4,4'-(1,1-Dioxido-3H-2,1-benzoxathiol-3-ylidene)bis[2-methylphenol]

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

Other grades of CAS 1733-12-6

Practical

Cresol red solution, practical grade

CAS: 1733-12-6
Formula: C₂₁H₁₈O₅S
MW: 382.4 g/mol

VQ-045722

AR

Cresol red, indicator GR

CAS: 1733-12-6
Formula: C₂₁H₁₈O₅S
MW: 382.4 g/mol

VQ-000333

Frequently asked questions

What is the CAS number of Cresol red solution?

The CAS Registry Number of Cresol red solution is 1733-12-6. It is also known as o-Cresolsulfonphthalein Solution, Cresol red, o-Cresolsulfonphthalein.

What is the molecular formula and molecular weight of Cresol red solution?

Cresol red solution has the molecular formula C21H18O5S and a molecular weight of 382.4 g/mol. Its IUPAC name is 4-[3-(4-hydroxy-3-methylphenyl)-1,1-dioxo-2,1lambda6-benzoxathiol-3-yl]-2-methylphenol.

Which grade and pack sizes of Cresol red solution can I order?

We supply Cresol red solution, in 125 mL, 10 x 125 mL, 25 L packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Cresol red solution?

Yes. Every lot of Cresol red solution 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 Cresol red solution be shipped internationally?

Yes. Cresol red solution 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.