Cresol red, indicator GR

Name: Cresol red, indicator GR
Brand: Vaqora Chemicals
SKU: VQ-000333

About Cresol red, indicator GR

Vaqora Chemicals supplies Cresol red (AR grade), an indicator registered under CAS number 1733-12-6. With the molecular formula C21H18O5S, it has a molar mass of 382.4 g/mol. Systematically, it is named 4-[3-(4-hydroxy-3-methylphenyl)-1,1-dioxo-2,1lambda6-benzoxathiol-3-yl]-2-methylphenol. It is also known as o-Cresolsulfonphthalein or o-Cresol Red.

It is supplied as a solid. Keep the container tightly sealed and store it in a cool, dry area. The GHS classification uses the signal word “Warning”, so appropriate gloves, eye protection and ventilation are recommended.

It is commonly used for titration end-point detection, pH determination and analytical testing. Typical end-use sectors are academic and industrial research.

We offer Cresol red in 5 g, 25 g, 100 g and 500 g packs with a batch-specific COA, and ship to customers worldwide. SDS and detailed specification sheets can be requested with your quotation.

Typical applications

Titration end-point detection
pH determination
Analytical testing

Industries

Grade guides

Specifications & identifiers

Chemical identifiers
Product name	Cresol red, indicator GR
Catalogue No.	VQ-000333
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
Grade	AR
HSN code	29349900
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	Solid
Appearance	Solid
LogP (XLogP3)	3.7
H-bond donors / acceptors	2 / 5
TPSA	92.2 Å²
Synonyms	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], o-Cresol, 4,4'-(3H-2,1-benzoxathiol-3-ylidene)di-, S,S-dioxide, Cresol red, indicator grade, Dye content 95 %

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

Cresol red solution

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

VQ-003536

Practical

Cresol red solution, practical grade

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

VQ-045722

Frequently asked questions

What is the CAS number of Cresol red, indicator GR?

The CAS Registry Number of Cresol red, indicator GR is 1733-12-6. It is also known as o-Cresolsulfonphthalein, o-Cresol Red, Cresolsulfophthalein.

What is the molecular formula and molecular weight of Cresol red, indicator GR?

Cresol red, indicator GR 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, indicator GR can I order?

We supply Cresol red, indicator GR in AR grade, in 5 g, 25 g, 100 g, 500 g, 1 kg, 4 x 25 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Cresol red, indicator GR?

Yes. Every lot of Cresol red, indicator GR 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, indicator GR be shipped internationally?

Yes. Cresol red, indicator GR 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.