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Bromocresol Purple sodium salt

ALDRICH/860891 - indicator grade, Dye content 90 %

Synonym: 5′,5″-Dibromo-o-cresolsulfonphthalein sodium salt

CAS Number: 62625-30-3
Empirical Formula (Hill Notation): C21H15Br2NaO5S
Molecular Weight: 562.20
EC Number: 263-655-3
MDL Number: MFCD00148896
Linear Formula: C21H15Br2NaO5S
Product Type: Chemical
Catalog Number PKG Qty. Price Quantity
45-860891-5G 5 g
 $35.10
1/EA		 Add To Favorites
45-860891-25G 25 g
 $120.00
1/EA		 Add To Favorites
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material. This image depicts SKU: 860891-25G
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material. This image depicts SKU: 860891-5G

 

ε (extinction coefficient) ≥47000 at 587-591 nm in 0.1 M NaOH
  ≥7000 at 375-381 nm in 0.1 M NaOH
λmax 379 nm
  585 nm (2nd)
application(s) diagnostic assay manufacturing
hematology
histology
color brown to very dark brown, to Very Dark Red
composition Dye content, 90%
form powder
grade indicator grade
InChI 1S/C21H16Br2O5S.Na/c1-11-7-13(9-16(22)19(11)24)21(14-8-12(2)20(25)17(23)10-14)15-5-3-4-6-18(15)29(26,27)28-21;/h3-10,24-25H,1-2H3;/q;+1/p-1
InChI key WNOIORUCCYNQPE-UHFFFAOYSA-M
mp 255 °C (dec.) (lit.)
Quality Level 200 
SMILES string [Na+].Cc1cc(cc(Br)c1O)C2(OS(=O)(=O)c3ccccc23)c4cc(C)c([O-])c(Br)c4
storage temp. room temp
technique(s) titration: suitable
visual transition interval 5.2-6.8, yellow to purple
Application: Bromocresol Purple is widely used as a vital stain to trace fluid diffusion in the lymphatic system. In addition, the dye is suitable to differentiate dead or live yeast cells. As a pH indicator, Bromocresol Purple is used in microbial culture media, both broth, and agar. In analytical experiments, e.g., to stain carbonic anhydrase isoenzyme on cellulose acetate electrophoresis membranes, bromocresol purple is used.
General description: Bromocresol Purple, also known as dibromo-o-cresolsulfonphthalein, is an acidic dye and belongs to the phthalein and sulphonphthalein dyes group. The dye color changes from yellow to violet at pH 5.2-6.8. The monosodium salt of the dye is 8% soluble in water and 2% in ethanol. Bromocresol Purple, under alkaline conditions, forms a hydrophilic, moderately sized dianion that is purple.
Packaging: 5, 25 g in glass bottle
mp 255 °C (dec.) (lit.)
Storage Temp. room temp
UNSPSC 12171500

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