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Safety Information

277339

Sigma-Aldrich

Methyl Purple

in H2O

Synonym(s):

Methyl Purple indicator solution

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About This Item

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.

Storage Class Code

12 - Non Combustible Liquids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

JAN Code

277339-BULK:
277339-1L:
277339-VAR:

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Certificates of Analysis (COA)

Lot/Batch Number
MKCH8122
MKBX9615V
MKBS9486V
MKBQ0022V
MKBH2537

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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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