Bromopyrogallol red, GR

Name: Bromopyrogallol red, GR
Brand: Vaqora Chemicals
SKU: VQ-000325

About Bromopyrogallol red, GR

Bromopyrogallol red (CAS 16574-43-9) is an indicator offered by Vaqora Chemicals in AR grade. The compound has the formula C19H10Br2O8S, corresponding to a molecular weight of 558.2 g/mol. Systematically, it is named 2',7'-dibromo-1,1-dioxospiro[2,1lambda6-benzoxathiole-3,9'-xanthene]-3',4',5',6'-tetrol. It is also known as 5',5''-Dibromopyrogallolsulfonephthalein or Pyrogallol bromine red.

It is supplied as a dark brown powder. Reported physical data include a melting point of 300 °C. Store sealed in a dry, well-ventilated location away from incompatible materials. Handle it with standard laboratory precautions and appropriate personal protective equipment.

It is commonly used for titration end-point detection, pH determination and analytical testing. It is used across academic and industrial research.

Vaqora Chemicals supplies Bromopyrogallol red in 1 g, 5 g, 100 g and 5 x 1 kg packs, each shipped with a Certificate of Analysis (COA), and exports worldwide.

Typical applications

Titration end-point detection
pH determination
Analytical testing

Industries

Grade guides

Specifications & identifiers

Chemical identifiers
Product name	Bromopyrogallol red, GR
Catalogue No.	VQ-000325
CAS Number	16574-43-9
IUPAC name	2',7'-dibromo-1,1-dioxospiro[2,1lambda6-benzoxathiole-3,9'-xanthene]-3',4',5',6'-tetrol
Molecular formula	C₁₉H₁₀Br₂O₈S
Molecular weight	558.2 g/mol
Exact mass	557.8443
Grade	AR
HSN code	29322090
InChIKey	QFXYYBXMARTXHI-UHFFFAOYSA-N
SMILES	C1=CC=C2C(=C1)C3(C4=CC(=C(C(=C4OC5=C(C(=C(C=C53)Br)O)O)O)O)Br)OS2(=O)=O
PubChem CID	85495

Physical properties
Physical form	Powder
Appearance	Dark brown powder
Melting point	300 °C
LogP (XLogP3)	3.5
H-bond donors / acceptors	4 / 8
TPSA	142 Å²
Synonyms	5',5''-Dibromopyrogallolsulfonephthalein, Pyrogallol bromine red, Dibromopyrogallolsulfonphthaleine, Brompyrogallol Red, US8987474, Bromopyrogallol, 5 ,5 -Dibromopyro- gallolsulfonephthalein, Bromopyrogallol Red, indicator grade, Dye content 70 %, 2',7'-dibromo-1,1-dioxospiro[2,1$l^{6-benzoxathiole-3,9'-xanthene]-3',4',5',6'-tetrol, Spiro[3H-2,9'-[9H]xanthene]-3',4',5',6'-tetrol, 2',7'-dibromo-, 1,1-dioxide, Spiro[3H-2,9'-xanthene]-3',4',5',6'-tetrol, 2',7'-dibromo-, 1,1-dioxide, 2',7'-dibromo-1,1-dioxo-spiro[2,1lambda6-benzoxathiole-3,9'-xanthene]-3',4',5',6'-tetrol

Safety & hazard information (GHS)

Environmental hazard

Hazard statements

H411Toxic to aquatic life with long lasting effects

Precautionary statements: P273, P391, 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

Other grades of CAS 16574-43-9

Bromopyrogallol red, 70%

CAS: 16574-43-9
Formula: C₁₉H₁₀Br₂O₈S
MW: 558.2 g/mol

VQ-045571

Frequently asked questions

What is the CAS number of Bromopyrogallol red, GR?

The CAS Registry Number of Bromopyrogallol red, GR is 16574-43-9. It is also known as 5',5''-Dibromopyrogallolsulfonephthalein, Pyrogallol bromine red, Dibromopyrogallolsulfonphthaleine.

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

Bromopyrogallol red, GR has the molecular formula C19H10Br2O8S and a molecular weight of 558.2 g/mol. Its IUPAC name is 2',7'-dibromo-1,1-dioxospiro[2,1lambda6-benzoxathiole-3,9'-xanthene]-3',4',5',6'-tetrol.

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

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

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

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

Yes. Bromopyrogallol red, GR 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.