Toluidine red

Name: Toluidine red
Brand: Zemixal
SKU: ZX-034600

Reference StandardAvailable on request

Order Toluidine red (CAS 2425-85-6) online at Zemixal. Request a quote with price, lead time and documents. Packs from 10 mg.

Pack sizes

CAS number2425-85-6

FormulaC₁₇H₁₃N₃O₃

Molar mass307.3 g/mol

Physical formSolid

HS code38229090

InChIKeyZLFVRXUOSPRRKQ-UHFFFAOYSA-N

IUPAC name1-[(4-methyl-2-nitrophenyl)diazenyl]naphthalen-2-ol

About Toluidine red

Toluidine red belongs to the Fludarabine reference-standard family in the Zemixal catalogue. Key data (Reference Standard): CAS 2425-85-6, formula C17H13N3O3 and molar mass 307.3 g/mol. It is handled as a solid.

Typical applications

Identification & assay
Method development & validation
QC reference material

Storage and safety notes

Hazard communication follows GHS (Danger: H318, H410 and H413). Our SDS lists exposure controls and first-aid measures.

Available as 10 mg, 25 mg, 50 mg and 100 mg. Larger or split packs can be arranged. You receive a certificate of analysis with characterisation data with each order. Request pricing online and we confirm availability, documentation and freight to your country.

Reference standards for Fludarabine

See every impurity, metabolite and related compound we list for this API.

Fludarabine standards

Typical uses

Identification & assay
Method development & validation
QC reference material

Applications

Pharmaceutical Manufacturing and QC Research Labs and Universities

Specifications and identifiers

Specifications of Toluidine red
Product name	Toluidine red
Catalogue number	ZX-034600
CAS number	2425-85-6
IUPAC name	1-[(4-methyl-2-nitrophenyl)diazenyl]naphthalen-2-ol
Molecular formula	C₁₇H₁₃N₃O₃
Molar mass	307.3 g/mol
Exact mass	307.0957
Grade	Reference Standard
Physical form	Solid
XLogP3	4.8
H-bond donors / acceptors	1 / 5
Topological polar surface area	90.8 Å²
HS code	38229090
InChIKey	ZLFVRXUOSPRRKQ-UHFFFAOYSA-N
SMILES	CC1=CC(=C(C=C1)N=NC2=C(C=CC3=CC=CC=C32)O)[N+](=O)[O-]
PubChem CID	17047
Synonyms	Hansa Red B, Helio Red Toner, Siegle Red BB, Permanent Red 4R, Toluidine Red 3B, Fast Red R, Toluidine Toner, Independence Red, Helio Fast Red RN, Chromatex Red J, Toluidine Red R, Deep Fastona Red

Lot values are stated on the batch certificate of analysis. Ask for a typical COA with your quotation.

Safety and GHS hazards

Corrosive

Hazardous to the environment

Signal word Danger

H318Causes serious eye damage
H410Very toxic to aquatic life with long lasting effects
H413May cause long lasting harmful effects to aquatic life

Precautionary statements P264 + P265, P273, P280, P305 + P354 + P338, P317, P391, P501

Classification summarised from public GHS notifications. It can vary with grade and concentration, so always follow the SDS supplied with your lot.

Pack sizes

Pack sizes of Toluidine red
10 mg	Quoted on request
25 mg	Quoted on request
50 mg	Quoted on request
100 mg	Quoted on request

Need a different size? Bulk drums and custom packing are quoted on request through the quote form on this page.

Questions about Toluidine red

Which CAS number identifies Toluidine red?

Toluidine red is registered under CAS 2425-85-6. You may also see it listed as Hansa Red B, Helio Red Toner, Siegle Red BB. Our catalogue number for this item is ZX-034600.

What are the formula and molar mass of Toluidine red?

For Toluidine red, its formula is C17H13N3O3 and its molar mass is 307.3 g/mol. The systematic (IUPAC) name is 1-[(4-methyl-2-nitrophenyl)diazenyl]naphthalen-2-ol. InChIKey ZLFVRXUOSPRRKQ-UHFFFAOYSA-N lets you match it in any structure database.

How is Toluidine red used in pharmaceutical QC?

Toluidine red is a characterised reference material linked to Fludarabine. Laboratories use it to identify and quantify this impurity during method development and validation, stability work, batch release testing and regulatory submissions.

What grade and pack sizes are available for Toluidine red?

This listing is Reference Standard grade. Standard packs are 10 mg, 25 mg, 50 mg, 100 mg. Larger quantities and custom packing can be quoted on request.

Which documents come with Toluidine red?

Each lot ships with a batch certificate of analysis and a 16-section GHS safety data sheet. A typical COA or specification sheet can be shared with the quotation before you order.

Can Zemixal ship Toluidine red to my country?

Yes. Because Toluidine red is classed as hazardous, it travels in UN-approved packaging as dangerous goods under IATA or IMDG rules, with the export paperwork your broker needs.

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