Patton & reader's reagent, GR

Name: Patton & reader's reagent, GR
Brand: Vaqora Chemicals
SKU: VQ-000680

About Patton & reader's reagent, GR

Patton and reader's reagent (CAS 3737-95-9) is a biological stain offered by Vaqora Chemicals (AR grade). The compound has the formula C21H14N2O7S, corresponding to a molecular weight of 438.4 g/mol. The IUPAC name is 3-hydroxy-4-[(2-hydroxy-4-sulfonaphthalen-1-yl)diazenyl]naphthalene-2-carboxylic acid. Common synonyms include Calconcarboxylic acid and Patton-Reeder indicator.

It is supplied as a dark green to black powder. Literature values give a melting point of 300 °C. Store in a tightly closed container in a cool, dry and well-ventilated place. Good laboratory practice and suitable PPE are recommended during handling.

Key uses span histology and cytology staining, microscopy, clinical laboratories and analytical determinations. It is used across academic and industrial research, diagnostics and biotechnology and textiles and dyeing.

Available in 5 g, 25 g, 100 g and 250 g packs, Patton and reader's reagent is dispatched with a Certificate of Analysis (COA) to destinations worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories
Analytical determinations

Industries

Grade guides

Specifications & identifiers

Chemical identifiers
Product name	Patton & reader's reagent, GR
Catalogue No.	VQ-000680
CAS Number	3737-95-9
IUPAC name	3-hydroxy-4-[(2-hydroxy-4-sulfonaphthalen-1-yl)diazenyl]naphthalene-2-carboxylic acid
Molecular formula	C₂₁H₁₄N₂O₇S
Molecular weight	438.4 g/mol
Exact mass	438.0522
Grade	AR
HSN code	29270090
InChIKey	MVQBFZXBLLMXGS-UHFFFAOYSA-N
SMILES	C1=CC=C2C(=C1)C=C(C(=C2N=NC3=C(C=C(C4=CC=CC=C43)S(=O)(=O)O)O)O)C(=O)O
PubChem CID	77330

Physical properties
Physical form	Powder
Appearance	Dark green to black powder
Melting point	300 °C
LogP (XLogP3)	4.3
H-bond donors / acceptors	4 / 9
TPSA	165 Å²
Synonyms	Calconcarboxylic acid, Patton-Reeder indicator, Calconcarbonic acid, Patton and Reeder's indicator, Calcon 3-carboxylic acid, Cal Red, Calcon-carboxylic Acid, 2-Hydroxy-1-(2-hydroxy-4-sulfo-1-naphthylazo)-3-naphthoic acid, 3-Hydroxy-4-((2-hydroxy-4-sulfonaphthalen-1-yl)diazenyl)-2-naphthoic acid, 2,2'-Dihydroxy-4'-sulpho-1,1'-azonaphthalene-3-carboxylic acid, 2-Hydroxy-1-(2-hydroxy-4-sulfo-1-napthylazo)-3-naphthoic acid, 2-Naphthalenecarboxylic acid, 3-hydroxy-4-[(2-hydroxy-4-sulfo-1-naphthalenyl)azo]-

Documents

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

Other grades of CAS 3737-95-9

AR

Calconcarboxylic acid, GR

CAS: 3737-95-9
Formula: C₂₁H₁₄N₂O₇S
MW: 438.4 g/mol

VQ-000525

Practical

Calconcarboxylic acid, practical grade

CAS: 3737-95-9
Formula: C₂₁H₁₄N₂O₇S
MW: 438.4 g/mol

VQ-045648

Frequently asked questions

What is the CAS number of Patton & reader's reagent, GR?

The CAS Registry Number of Patton & reader's reagent, GR is 3737-95-9. It is also known as Calconcarboxylic acid, Patton-Reeder indicator, Calconcarbonic acid.

What is the molecular formula and molecular weight of Patton & reader's reagent, GR?

Patton & reader's reagent, GR has the molecular formula C21H14N2O7S and a molecular weight of 438.4 g/mol. Its IUPAC name is 3-hydroxy-4-[(2-hydroxy-4-sulfonaphthalen-1-yl)diazenyl]naphthalene-2-carboxylic acid.

Which grade and pack sizes of Patton & reader's reagent, GR can I order?

We supply Patton & reader's reagent, GR in AR grade, in 5 g, 25 g, 100 g, 250 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 Patton & reader's reagent, GR?

Yes. Every lot of Patton & reader's reagent, GR 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 Patton & reader's reagent, GR be shipped internationally?

Yes. We export Patton & reader's reagent, GR worldwide by air and sea freight or express courier, on EXW, FOB, CIF, CFR or DAP Incoterms, with full export documentation.