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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
MSDS
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COAs
Packings
25 g
(00025)
100 g
(00100)
Print friendly version
Article No.
03670
Grade
AR/ACS
Purity
CAS No.
1787-61-7
Molecular Formula
C
2
0
H
1
2
N
3
NaO
7
S
Molecular Weight
461.38
H.S. Code
3204.9000
Shelf Life
60 Months
Physical Properties
Physical state at 20 °C
Solid
Colour
Brownish black powder
Odour
Odorless
Specifications
Appearance
Brownish black powder
Suitability (as metal indicator)
Passes test
Absorption maxima at pH 10
605 - 625 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%
Safety Information and Hazard Symbols
Symbol: GHS07, GHS09
Signal Word: Warning
UN No.: 3077
IMCO Class No.: 9
Packing Group: III
Hazardous Statement: H319-H411
Precaution Statement: P273-P280-P305+P351+P338
Revision Date:
23-Sep-2026
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ERIOCHROME BLACK T