Pyrogallol red, GR

Name: Pyrogallol red, GR
Brand: Vaqora Chemicals
SKU: VQ-000691

About Pyrogallol red, GR

Pyrogallol red is a biological stain (AR grade) carrying the CAS registry number 32638-88-3. Formula C19H12O8S, molecular weight 400.4 g/mol. Systematically, it is named 1,1-dioxospiro[2,1lambda6-benzoxathiole-3,9'-xanthene]-3',4',5',6'-tetrol. Common synonyms include Pyrogallolsulfonephthalein and Pyrogallol sulfonphthalein.

In its supplied form it is a green to very dark green and brown powder. Key physical data: a melting point of ≥300 °C and a density of 1.93 g/cm3 (Predicted). Store sealed in a dry, well-ventilated location away from incompatible materials. Handle it with standard laboratory precautions and appropriate personal protective equipment.

Key uses span histology and cytology staining, microscopy, clinical laboratories and antioxidant additive. Our customers for this product work in academic and industrial research, diagnostics and biotechnology and textiles and dyeing.

We offer Pyrogallol red in 1 g, 5 g, 100 g and 1 kg packs with a batch-specific COA, and ship to customers worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories
Antioxidant additive

Industries

Grade guides

Specifications & identifiers

Chemical identifiers
Product name	Pyrogallol red, GR
Catalogue No.	VQ-000691
CAS Number	32638-88-3
IUPAC name	1,1-dioxospiro[2,1lambda6-benzoxathiole-3,9'-xanthene]-3',4',5',6'-tetrol
Molecular formula	C₁₉H₁₂O₈S
Molecular weight	400.4 g/mol
Exact mass	400.0253
Grade	AR
HSN code	29349900
InChIKey	KUQNCHZOCSYKOR-UHFFFAOYSA-N
SMILES	C1=CC=C2C(=C1)C3(C4=C(C(=C(C=C4)O)O)OC5=C3C=CC(=C5O)O)OS2(=O)=O
PubChem CID	94437

Physical properties
Physical form	Powder
Appearance	Green to very dark green and brown powder
Melting point	≥300 °C
Density	1.93 g/cm3 (Predicted)
LogP (XLogP3)	2.1
H-bond donors / acceptors	4 / 8
TPSA	142 Å²
Synonyms	Pyrogallolsulfonephthalein, Pyrogallol sulfonphthalein, Spiro(3H-2,1-benzoxathiole-3,9'-(9H)xanthene)-3',4',5',6'-tetrol, 1,1-dioxide, Spiro[3H-2,1-benzoxathiole-3,9'-[9H]xanthene]-3',4',5',6'-tetrol, 1,1-dioxide, 3',4',5',6'-Tetrahydroxyspiro[benzo[c][1,2]oxathiole-3,9'-xanthene] 1,1-dioxide, 3',4',5',6'-tetrahydroxyspiro[2,1-benzoxathiole-3,9'-xanthene]-1,1-dione, 3',4',5',6'-Tetrahydroxyspiro[benzo[c][1,2]oxathiole-3,9'-xanthene]1,1-dioxide, US8987474, PyrogallolRed, 1,1-dioxospiro[2,1lambda6-benzoxath, 12,13,14,15-tetrahydroxyspiro[benzo[c]1,2-oxathiolane-3,9'-xanthene]-1,1-dione, 3',4',5',6'-tetrahydroxyspiro[2,1lambda-benzoxathiole-3,9'-xanthene]-1,1-dione, 3',4',5',6'-tetrahydroxyspiro[2,1lambda6-benzoxathiole-3,9'-xanthene]-1,1-dione

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 32638-88-3

Pyrogallol red

CAS: 32638-88-3
Formula: C₁₉H₁₂O₈S
MW: 400.4 g/mol

VQ-046791

Frequently asked questions

What is the CAS number of Pyrogallol red, GR?

The CAS Registry Number of Pyrogallol red, GR is 32638-88-3. It is also known as Pyrogallolsulfonephthalein, Pyrogallol sulfonphthalein, Spiro(3H-2,1-benzoxathiole-3,9'-(9H)xanthene)-3',4',5',6'-tetrol, 1,1-dioxide.

What is the molecular formula and molecular weight of Pyrogallol red, GR?

Pyrogallol red, GR has the molecular formula C19H12O8S and a molecular weight of 400.4 g/mol. Its IUPAC name is 1,1-dioxospiro[2,1lambda6-benzoxathiole-3,9'-xanthene]-3',4',5',6'-tetrol.

Which grade and pack sizes of Pyrogallol red, GR can I order?

We supply Pyrogallol red, GR in AR grade, in 1 g, 5 g, 100 g, 1 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Pyrogallol red, GR?

Yes. Every lot of Pyrogallol red, 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 Pyrogallol red, GR be shipped internationally?

Yes. We export Pyrogallol red, GR worldwide by air and sea freight or express courier, on EXW, FOB, CIF, CFR or DAP Incoterms, with full export documentation.