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Sigma-Aldrich

Methyl Purple

in H2O

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Synonym(s):
Methyl Purple indicator solution
Empirical Formula (Hill Notation):
C67H62N8Na4O14S3
CAS Number:
1340-02-9
Molecular Weight:
1391.41
MDL number:
MFCD00070843
UNSPSC Code:
12171500
PubChem Substance ID:
24856754
NACRES:
NA.47

form

liquid

Quality Level

100

concentration

in H2O

pH

4.8-5.4, violet to green

mp

0 °C

density

1.001 g/mL at 25 °C

λmax

409 nm
618 nm (2nd)

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

CN(C)c1ccc(cc1)N=Nc2ccccc2C(=O)O[Na].CN(C)c3ccc(cc3)N=Nc4ccccc4C(=O)O[Na].CCN(Cc5cccc(c5)S(=O)(=O)O[Na])c6ccc(cc6)C(=C7/C=CC(C=C7)=[N+](CC)Cc8cccc(c8)S([O-])(=O)=O)\c9ccc(O)cc9S(=O)(=O)O[Na]

InChI

1S/C37H36N2O10S3.2C15H15N3O2.4Na/c1-3-38(24-26-7-5-9-33(21-26)50(41,42)43)30-15-11-28(12-16-30)37(35-20-19-32(40)23-36(35)52(47,48)49)29-13-17-31(18-14-29)39(4-2)25-27-8-6-10-34(22-27)51(44,45)46;2*1-18(2)12-9-7-11(8-10-12)16-17-14-6-4-3-5-13(14)15(19)20;;;;/h5-23H,3-4,24-25H2,1-2H3,(H3,41,42,43,44,45,46,47,48,49);2*3-10H,1-2H3,(H,19,20);;;;/q;;;4*+1/p-4/b;2*17-16+;;;;

InChI key

CNJVTYXLOYTWPD-HFZRWZJVSA-J

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General description

Methyl purple is a quinone-imide redox dye.

Biochem/physiol Actions

Methyl Purple is a green colored powder. It changes color from purple (pH 4.8) to green (pH 5.4). Methyl Purple acts as an antimicrobial agent. In addition, it also aids in detection of lactic acid bacteria and determination of iron in human hair.

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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T Graan et al.
Analytical biochemistry, 144(1), 193-198 (1985-01-01)
Methyl purple is a recently introduced quinone-imide redox dye that has been shown to be an exceptionally sensitive monitor of photosystem I activity in chloroplasts. This compound has a wide range of potential applications for studies of photosynthetic electron transfer
R. W. Sabnis
Handbook of Acid-Base Indicators (2007)

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