Molekula

Eriochrome Black T (C.I. 14645)

SKU 51499212 CAS 1787-61-7 C20H12N3NaO7S MW 461.38 In stock

Eriochrome Black T (C.I. 14645) is a metallochromic indicator used in complexometric titrations, particularly for determining water hardness. It appears as a dark green powder and changes color in response to metal ion concentration. CAS: 1787-61-7, Molecular Formula: C20H12N3NaO7S, Molecular Weight: 461.38 g/mol. Store at ambient temperature. Signal word: Warning. Molekula supplies Eriochrome Black T from research to bulk quantities with full documentation and ISO 9001:2015 traceability.

CoA by batch Download specification

Overview

Pricing & pack sizes

Pack sizes & pricing

£ GBP € EUR $ USD

25 g — $79.50 per pack
100 g — $188.10 per pack

Prices exclude VAT/sales tax and shipping. Bulk and custom pack sizes available on request.

Specifications

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Property	Value
Appearance	Black powder
Strength	≥100.0%

Storage & handling

Property	Value
Storage Temperature	Ambient
Transport Class	9
Packing Group	III
Shelf Life	60 months
Acidity	Neutral

Identification

Property	Value
SKU	51499212
CAS Number	1787-61-7
Molecular Formula	C20H12N3NaO7S
Molecular Weight	461.38
SMILES	[Na].O=N(=O)C1=CC=C2C(N=NC=3C=CC=4C=CC=CC4C3O)=C(O)C=C(C2=C1)S(=O)(=O)O
EC / UN Number	3077
REACH Code	Y110
TSCA Listed	Yes
HTS Code	29270040
Tariff Code	2927000090

Safety & GHS

Warning

Health Hazard GHS07
Hazardous to the Environment GHS09

Hazard statements

H319 Causes serious eye irritation
H332 Harmful if inhaled
H400 Very toxic to aquatic life
H411 Toxic to aquatic life with long lasting effects

Precautionary statements

P260 Do not breathe dust/fume/gas/mist/vapours/spray
P273 Avoid release to the environment
P280 Wear protective gloves/protective clothing/eye protection/face protection
P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
P337+313 If eye irritation persists get medical advice/attention
P501 Dispose of contents/container to an approved waste disposal plant

For research and industrial use only

Not for use in food, drugs, household, or in or on humans or animals. Consult the Safety Data Sheet before handling.

Documents

Safety Data Sheets (SDS)

Available in PT, IT, ES, DE, FR, EN.

Certificate of Analysis (CoA) by batch

Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.

Synonyms

No alternate names recorded for this product.

Frequently asked questions

What is Eriochrome Black T used for?

Eriochrome Black T is primarily used as a metal ion indicator in complexometric titrations, especially for detecting calcium and magnesium ions in water hardness tests.

What is the chemical formula and molecular weight of Eriochrome Black T?

The formula is C20H12N3NaO7S with a molecular weight of 461.38 g/mol.

How should Eriochrome Black T be stored?

It should be stored at ambient temperature, protected from moisture and light.

What grade of Eriochrome Black T does Molekula supply?

Molekula supplies Eriochrome Black T in analytical grade, suitable for laboratory use.

Can Molekula supply Eriochrome Black T in bulk?

Yes, Molekula can supply Eriochrome Black T in bulk quantities—please contact our sales team for pricing and availability.

What documentation comes with an order of Eriochrome Black T?

Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) with the shipment.

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