Azure A

Azure A
Names
	IUPAC name N',N'-dimethylphenothiazin-5-ium-3,7-diamine chloride
	Other names asym-Dimethylthionine Chloride; Methylene Azure A
Identifiers
CAS Number	531-53-3 ;
3D model (JSmol)	Interactive image;
Beilstein Reference	3922287
ChEBI	CHEBI:87637 ;
ChemSpider	11218930 ;
ECHA InfoCard	100.007.738
PubChem CID	13735;
UNII	M731V243EF ;
CompTox Dashboard (EPA)	DTXSID2040157 ;
	InChI InChI=1S/C14H14N3S.ClH/c1-17(2)10-4-6-12-14(8-10)18-13-7-9(15)3-5-11(13)16-12;/h3-8H,15H2,1-2H3;1H/q+1;/p-1 Key: PGWTYMLATMNCCZ-UHFFFAOYSA-M ;
	SMILES [Cl-].CN(C)c1cc2[s+]c3cc(N)ccc3nc2cc1;
Properties
Chemical formula	C14H14ClN3S
Appearance	green to dark brown powder
Density	1.776
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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	Infobox references

Azure A is an organic compound with the chemical formula C₁₄H₁₄ClN₃S. It is a light blue to dark blue dye. It is used as a screening test for mucopolysaccharides. It can also be used to stain lysosome in blood smears, and is often used in Giemsa stain.

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