Chromotrope 2R

Name: Chromotrope 2R
Brand: Vaqora Chemicals
SKU: VQ-000535

About Chromotrope 2R

Listed under CAS 4197-07-3, Chromotrope 2R is a biological stain available from Vaqora Chemicals in Microscopy grade. The compound has the formula C16H10N2Na2O8S2, corresponding to a molecular weight of 468.4 g/mol. The IUPAC name is disodium, 4,5-dihydroxy-3-phenyldiazenylnaphthalene-2,7-disulfonate. It is also known as 2-(Phenylazo)chromotropic acid disodium salt or Acid Red 29.

It is supplied as a solid. Store sealed in a dry, well-ventilated location away from incompatible materials. It carries the GHS signal word “Warning” with 3 hazard statements. Review the Safety Data Sheet before use.

Typical applications include histology and cytology staining, microscopy, clinical laboratories and biological staining. Buyers come mainly from academic and industrial research, diagnostics and biotechnology and textiles and dyeing.

We offer Chromotrope 2R in 10 g, 25 g, 1 kg and 4 x 25 kg packs with a batch-specific COA, and ship to customers worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories
Biological staining

Industries

Specifications & identifiers

Chemical identifiers
Product name	Chromotrope 2R
Catalogue No.	VQ-000535
CAS Number	4197-07-3
IUPAC name	disodium;4,5-dihydroxy-3-phenyldiazenylnaphthalene-2,7-disulfonate
Molecular formula	C₁₆H₁₀N₂Na₂O₈S₂
Molecular weight	468.4 g/mol
Exact mass	467.9674
Grade	Microscopy
HSN code	32049000
InChIKey	GXEAXHYQKZAJGB-UHFFFAOYSA-L
SMILES	C1=CC=C(C=C1)N=NC2=C(C3=C(C=C(C=C3C=C2S(=O)(=O)[O-])S(=O)(=O)[O-])O)O.[Na+].[Na+]
PubChem CID	20172

Physical properties
Physical form	Solid
Appearance	Solid
H-bond donors / acceptors	2 / 10
TPSA	196 Å²
Synonyms	2-(Phenylazo)chromotropic acid disodium salt, Acid Red 29, Disodium 4,5-dihydroxy-3-phenylazonaphthalene-2,7-disulphonate, Fast fuchsine G, Fast fuchsin G, Cromatrope 2R, C.I. Acid Red 29, Hispacid fuchsin G, Chromotrope Red 2R, Acid Chromotrope 2R, Acilan chromotrope RR, Brasilan Fast fuchsine G

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P261, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of Chromotrope 2R?

The CAS Registry Number of Chromotrope 2R is 4197-07-3. It is also known as 2-(Phenylazo)chromotropic acid disodium salt, Acid Red 29, Disodium 4,5-dihydroxy-3-phenylazonaphthalene-2,7-disulphonate.

What is the molecular formula and molecular weight of Chromotrope 2R?

Chromotrope 2R has the molecular formula C16H10N2Na2O8S2 and a molecular weight of 468.4 g/mol.

Which grade and pack sizes of Chromotrope 2R can I order?

We supply Chromotrope 2R in Microscopy grade, in 10 g, 25 g, 1 kg, 4 x 25 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Chromotrope 2R?

Yes. Every lot of Chromotrope 2R is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Chromotrope 2R be shipped internationally?

Yes. Chromotrope 2R is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.