溴甲酚紫

Name: 溴甲酚紫
Brand: 济南圣和化工有限公司

CAS 115-40-2C21H16Br2O5SMW 540.2

溴甲酚紫，CAS 登记号 115-40-2，由济南圣和化工有限公司现货供应，可提供纯度按批次COA提供(不公开发布) 的规格，下游主要用于有机化学品。支持样品与小批量试用，批量价格请联系我们获取，验收以批次 COA 为准。

规格参数

CAS号115-40-2

分子式C21H16Br2O5S

分子量540.2

熔点241.5 °C

LogP5.1

纯度按批次COA提供(不公开发布)

包装按订单/批次确认(不公开发布)

应用领域有机化学品

类别有机化学品

用途与场景

有机化学品

包装与供货

包装规格按订单/批次确认(不公开发布)

纯度规格按批次COA提供(不公开发布)

储存条件密封、阴凉干燥处保存

供货周期现货/按订单安排

文件与支持

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常见问题

在哪里能查到溴甲酚紫的 CAS 号？

本页已列出溴甲酚紫的 CAS 号：115-40-2，可与随货 COA 核对。

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溴甲酚紫一般用在什么产品里？

主要涉及有机化学品。

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PubChem 公开数据

Description

Bromocresol Purple · CAS 115-40-2 · C21H16Br2O5S. UNII 201C22C3EC. Melting Point: 241.5 °C; Dissociation Constants: pKa = 6.3.

Identification

CAS Registry Number	115-40-2
PubChem CID	8273
Molecular formula	C21H16Br2O5S
IUPAC name	2-bromo-4-[3-(3-bromo-4-hydroxy-5-methylphenyl)-1,1-dioxo-2,1λ6-benzoxathiol-3-yl]-6-methylphenol
UNII (FDA)	201C22C3EC

Computed Descriptors

Molecular Weight	540.2
XLogP3	5.1
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	5
Rotatable Bond Count	2
Exact Mass	539.90647
Monoisotopic Mass	537.90852
Topological Polar Surface Area	92.2
Heavy Atom Count	29
Formal Charge	0

Physical & Chemical Properties

Melting Point	241.5 °C
Dissociation Constants	pKa = 6.3

Physical description & handling notes

Odorless, pale-yellow to purple solid; Available as pure compound, monosodium salt, and dilute solutions; [CHEMINFO]
Minute, slightly yellow crystals
Soluble in alcohol, dilute alkalies

Regulatory Status

GHS notification summary	6.9% (7 / 101)

GHS Hazard Classification

GHS notification summary	6.9% (7 / 101)
Reported hazard statements	H315 (93.1%), H319 (93.1%), H335 (92.1%)

This chemical does not meet GHS hazard criteria for 6.9% (7 of 101) of reports.

H315 (93.1%): Causes skin irritation [Warning Skin corrosion/irritation]

Documented Uses

A sulfonphthalein dye used as a pH indicator; [CHEMINFO] Used as a pH indicator for the pH range of 5.2-6.8 and 10.2-11.8; [Ullmann]
As indicator, pH 5.2 yellow; pH 6.8 purple
Prepared by treating o-cresol red with bromine in glacial acetic acid.
Phenol, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis[2-bromo-6-methyl-: ACTIVE

Synonyms

Bromocresol purple; 115-40-2; BROMCRESOL PURPLE; DTXSID3059428; HSDB 7729; 201C22C3EC; NSC-374134; Phenol, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis[2-bromo-6-methyl-; CHEBI:86154; Phenol, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis(2-bromo-6-methyl-; Purple, Bromcresol; Purple, Bromocresol; RefChem:121504; DTXCID8033354; Phenol, 4,4'-(3H-2,1-benzoxathiol-3-ylidene)bis(2-bromo-6-methyl)-, S,S-dioxide; 204-087-8

Frequently Asked Questions

What are the CAS number and molecular formula of Bromocresol Purple?

CAS 115-40-2; molecular formula C21H16Br2O5S; molecular weight — g/mol.

What other names is Bromocresol Purple known by?

Bromocresol purple, 115-40-2, BROMCRESOL PURPLE, DTXSID3059428, HSDB 7729, 201C22C3EC.

Is Bromocresol Purple classified as hazardous?

6.9% of GHS notifications report no hazard classification (7 of 101).

What are the key physical properties of Bromocresol Purple?

Melting Point: 241.5 °C; Dissociation Constants: pKa = 6.3.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.

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