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


45-860891-5G	5 g	$33.70 1/EA	Add To Favorites
45-860891-25G	25 g	$115.00 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

Properties
Descriptions
Safety Info.
Basic Data

ε (extinction coefficient)	≥47000 at 587-591 nm in 0.1 M NaOH
	≥7000 at 375-381 nm in 0.1 M NaOH
λ_max	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

Symbol	GHS07
Signal word	Warning
Hazard statements	H315 - H319 - H335
Precautionary statements	P302 + P352 - P305 + P351 + P338
Hazard Codes	Xi
Risk Statements	36/37/38
Safety Statements	26-36/37
RIDADR	NONH for all modes of transport
WGK Germany	WGK 3
Flash Point(F)	Not applicable
Flash Point(C)	Not applicable

mp	255 °C (dec.) (lit.)
Storage Temp.	room temp
UNSPSC	12171500

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