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Cresol red

Cresol red structure

CAS No:
1733-12-6
Formula:
C21H18O5S
Chemical Name:
Cresol red
Synonyms:
Phenol,4,4′-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis[2-methyl-;o-Cresol,4,4′-(3H-2,1-benzoxathiol-3-ylidene)di-,S,S-dioxide;o-Cresolsulfonephthalein;Phenol,4,4′-(3H-2,1-benzoxathiol-3-ylidene)bis[2-methyl-,S,S-dioxide;o-Toluenesulfonic acid,α-hydroxy-α,α-bis(4-hydroxy-m-tolyl)-,γ-sultone;3H-2,1-Benzoxathiole,phenol deriv.;4,4′-(1,1-Dioxido-3H-2,1-benzoxathiol-3-ylidene)bis[2-methylphenol];o-Cresol Red;o-Cresolsulfonphthalein;Cresol red;3′,3′′-Dimethylphenolsulfonephthalein;Cresolsulfophthalein;NSC 7224;32210-84-7
Categories:
Biochemical Engineering > Biochemical Reagents

Description

Dark green or brown-red powderChEBI: A member of the class of 2,1-benzoxathioles that is 2,1-benzoxathiole 1,1-dioxide in which both of the hydrogens at position 3 have been substituted by 4-hydroxy-5-methylphenyl groups.

Cresol red is a member of the class of 2,1-benzoxathioles that is 2,1-benzoxathiole 1,1-dioxide in which both of the hydrogens at position 3 have been substituted by 4-hydroxy-5-methylphenyl groups. It has a role as an acid-base indicator, a dye and a two-colour indicator. It is a 2,1-benzoxathiole, an arenesulfonate ester, a polyphenol and a sultone.

Cresol red Basic Attributes

Molecular Weight：

382.43

Exact Mass：

382.43

BRN：

343399

EC Number：

217-064-2

UNII：

839K2R4B8K

NSC Number：

7224

DSSTox ID：

DTXSID8061929

HScode：

29349990

Characteristics

PSA：

92.2

XLogP3：

3.94

Appearance：

Dark green or brown-red Powder

Density：

0.98 g/mL at 25 °C

Melting Point：

>300 °C

Boiling Point：

479.59°C (rough estimate)

Flash Point：

293.6±30.1 °C

Refractive Index：

1.5300 (estimate)

Water Solubility：

Solubility Sparingly soluble in water; soluble in ethanol

Storage Conditions：

Store at RT.

Safety Information

Transport codes：

UN1170 - class 3 - PG 3 - Ethanol, solution

wgk germany：

hazard class code：

36/37/38-20/21/22-11

safety instructions：

24/25-36-26-16

Marks：

Xi,Xn,F

Precautionary statement(s)：

P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501

Hazard Statements：

H315

GHS Classification：

|Warning|H315 (97.67%): Causes skin irritation [Warning Skin corrosion/irritation]|P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, and P501|Aggregated GHS information provided by 46 companies from 4 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Drug Information

MeSH Entry Terms：

Cresol red

Cresol red Use and Manufacturing

Methods of Manufacturing

Toluenesulfonic anhydride, o-cresol, and anhydrous zinc chloride are mixed, stirred and heated, and the condensation reaction is carried out at 115-120°C for about 7 hours, and the remaining o-cresol is purged by steam. Filter, the filter cake is dissolved with hot sodium carbonate aqueous solution, filter, add 1:1 hydrochloric acid to the clear filtrate to neutralize, and stir vigorously. The crystals were filtered out, washed with a small amount of water, and dried to obtain the finished product. If necessary, it can be purified by recrystallization from glacial acetic acid.

Uses

Acid-base indicator.

Manufacturing Info：

Phenol, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis[2-methyl-: ACTIVE

Computed Properties

Molecular Weight:382.4
XLogP3:3.7
Hydrogen Bond Donor Count:2
Hydrogen Bond Acceptor Count:5
Rotatable Bond Count:2
Exact Mass:382.08749484
Monoisotopic Mass:382.08749484
Topological Polar Surface Area:92.2
Heavy Atom Count:27
Complexity:615
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes

Material

Zinc chloride

o-Cresol

Recommended Suppliers of Cresol red

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Cresol Red,Indicator Grade, CAS:1733-12-6

CAS No.: 1733-12-6

Grade: Reagent Grade

Content: 99%

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Cresol Red

CAS No.: 1733-12-6

Grade: pharmaceutical grade

Content: 99%

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Guide of Cresol red

Description
Basic Attributes
Characteristics
Safety Information
Drug Information
Use and Manufacturing
Computed Properties
Material
Recommended Suppliers
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Cresol red

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