bromocresol purple cas 115-40-2

描述

Bromocresol Purple Details

Chemical Name:Bromocresol Purple

CAS No.:115-40-2

Molecular Formula: C21H16Br2O5S

Molecular Weight:540.22

MolecularStructure:

Appearance:Slightly yellow fine crystal

Bromocresol Purple Typical Properties

Item	Standard
The maximum absorption wavelength: λ1（PH 35.2）nm	427~431
The maximum absorption wavelength: λ2(PH 56.8) nm	588~590
Mass absorption coefficient（L/cm。g）α1(λ1PH 5.2,Dry sample)	40.5~45.0
Mass absorption coefficient（L/cm。g）α2（λ2PH 56.8,Dry sample）	100.0~110.0
PH Discoloration domain	5.2（yellow）~6.8（purple）
Dilute alkali dissolution test	Conforms
Residue on ignition(Sulfate)	0.1
Loss on Drying	0.5
Appearance	Conforms

Bromocresol Purple Usage

1. Used as an acid-base indicator with the color change from light yellow to purple and the pH range between 5.2-6.8

2. Used as an internal standard for amino acid chromatography

3. Used in silver salt method to titrate thiocyanate

4. Used in spectrophotometric method for precipitating serum proteins

Bromocresol Purple Packaging and Shipping

Packing: 25kg /drum

Delivery: by express, by sea,by air

Bromocresol Purple Storage

Stored in a cool ventilated warehouse