bromocresol purple cas 115-40-2

Chemical Name:Bromocresol Purple
CAS No.:115-40-2
Molecular Formula: C21H16Br2O5S
Molecular Weight:540.22
Appearance:Slightly yellow fine crystal

Description

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

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