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1.04138

Sigma-Aldrich

Malachite green oxalate (C.I. 42000)

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Empirical Formula (Hill Notation):
C52H54N4O12
CAS Number:
2437-29-8
Molecular Weight:
927.00
NACRES:
NA.21

form

solid

Quality Level

200

composition

Dye, ≥90% spectrophotometric assay

pH

2.4 (20 °C, 10 g/L in H2O)

mp

159 °C

solubility

110 g/L

bulk density

400‑500 kg/m3

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

2-30°C

InChI

1S/2C23H25N2.3C2H2O4/c2*1-24(2)21-14-10-19(11-15-21)23(18-8-6-5-7-9-18)20-12-16-22(17-13-20)25(3)4;3*3-1(4)2(5)6/h2*5-17H,1-4H3;3*(H,3,4)(H,5,6)/q2*+1;;;/p-2

InChI key

CNYGFPPAGUCRIC-UHFFFAOYSA-L

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General description

Malachite green oxalate (C.I. 42000) for microscopy Certistain®, is a dry dye that is used for the preparation of a staining solution that is used for differential spore staining in bacteriological samples of human origin. As CERTISTAIN® dye it is chemically quality-certified according to highest standards and strict specifications.

Application

for microscopy Certistain®

Analysis Note

Dye content (spectrophotometrically): ≥ 90% (als C₄₆H₅₀N₄ *2 C₂HO₄ *C₂H₂O₄)
Identity
- oxalate:
passes test
- UV/VIS-Spectrum: passes test
Absorption maximum λ max (water): 616 - 620 nm
Spec. Absorptivity A 1%/1cm (λmax; 0.003 g/l; water): 1730 - 1960
TLC-Test: passes test
Loss on drying (50 °C / <1 hPa): ≤ 7%
Suitability for microscopy: passes test

Legal Information

CERTISTAIN is a registered trademark of Merck KGaA, Darmstadt, Germany

Signal Word

Danger

Hazard Classifications

Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Eye Dam. 1 - Repr. 2

Storage Class Code

6.1C - Combustible, acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

WGK

WGK 3

Regulatory Information

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