ERIOCHROME BLACK T

ERIOCHROME BLACK T AR/ACS

C.I.No.14645 Indicator for the determination of calcium plus magnesium by titration with EDTA
Solochrome Black T, Sodium 4-[(1-hydroxynaphthalen-2-yl-hydrazinylidene]-7-nitro-3-oxo-Y-naphthalene-1-sulphonate

Article No.

03670

Grade

AR/ACS

Purity

CAS No.

1787-61-7

Molecular Formula

C₂₀H₁₂N₃NaO₇S

Molecular Weight

461.38

H.S. Code

3204.9000

Shelf Life

60 Months

MSDS

Certificate of Analysis (COAs)

Physical state at 20 °C

Solid

Colour

Brownish black powder

Odour

Odorless

Appearance	Brownish black powder
Suitability (as metal indicator)	Passes test
Absorption maxima at pH 10	612 - 616 nm
Clarity of solution	Passes test
Specific absorptivity A1%/1cm (λmax; 0.02 g/L; buffer pH 10.0; calculated on dried substance)	Min 300.0
Loss on drying (at 110°C)	Max 7.0%