JavaScript seems to be disabled in your browser. For the best experience on our site, be sure to turn on Javascript in your browser.

This is a demo store. No orders will be fulfilled.

Account

Settings

Language

྾

Home
Applications
Analytical Chemistry
Titration and Karl Fischer Titration
Pyrogallol Red - 95%, high purity , CAS No.32638-88-3

Skip to the end of the images gallery

Skip to the beginning of the images gallery

Pyrogallol Red - 95%, high purity , CAS No.32638-88-3

1 Citations

COA

Grade & Purity:

≥95%

Cas Number: 32638-88-3
Molecular Weight: 400.36
Beilstein Registry Number: 19407
MDL number: MFCD00005046
PubChem CID: 94437
PubChem SID: 504756220

In stock

Item Number

P169580

Grouped product items
SKU	Size	Availability	Price
P169580-250mg	250mg	2	$15.90
P169580-1g	1g	Available within 4-8 weeks(?) Items will be manufactured post-order and can take 4-8 weeks. Thank you for your patience!	$47.90
P169580-5g	5g	Available within 4-8 weeks(?) Items will be manufactured post-order and can take 4-8 weeks. Thank you for your patience!	$137.90

View related series

Oxaanthracene (36) Six-Membered Heterocyclic Compounds (1696) Spectroscopic reagent (233)

Basic Description

Synonyms	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 \| EINECS 251-134-3 \| PYROGALLOLRED \| Pyrogallolsulfonephthalein \| 1,1-dioxospiro[2,1lambda6-benzoxath
Specifications & Purity	≥95%
Storage Temp	Argon charged
Shipped In	Normal

Taxonomic Classification

Taxonomy Tree

Kingdom Organic compounds
- Superclass Organoheterocyclic compounds
  - Class Benzopyrans
    - Subclass 1-benzopyrans
      - Level5 Dibenzopyrans
        Level6 Xanthenes

Kingdom	Organic compounds
Superclass	Organoheterocyclic compounds
Class	Benzopyrans
Subclass	1-benzopyrans
Intermediate Tree Nodes	Dibenzopyrans
Direct Parent	Xanthenes
Alternative Parents	Diarylethers Phthalides Benzofuranones Benzoxathioles 1-hydroxy-4-unsubstituted benzenoids 1-hydroxy-2-unsubstituted benzenoids Organosulfonic acid esters Polyols Oxacyclic compounds Organic oxides Hydrocarbon derivatives
Molecular Framework	Aromatic heteropolycyclic compounds
Substituents	Xanthene - Diaryl ether - Benzofuranone - Phthalide - Benzoxathiole - 1-hydroxy-4-unsubstituted benzenoid - 1-hydroxy-2-unsubstituted benzenoid - Benzenoid - Organosulfonic acid ester - Organosulfonic acid or derivatives - Organic sulfonic acid or derivatives - Ether - Oxacycle - Polyol - Hydrocarbon derivative - Organooxygen compound - Organic oxygen compound - Organic oxide - Aromatic heteropolycyclic compound
Description	This compound belongs to the class of organic compounds known as xanthenes. These are polycyclic aromatic compounds containing a xanthene moiety, which consists of two benzene rings joined to each other by a pyran ring.
External Descriptors	Not available
1. Djoumbou Feunang Y, Eisner R, Knox C, Chepelev L, Hastings J, Owen G, Fahy E, Steinbeck C, Subramanian S, Bolton E, Greiner R, and Wishart DS. ClassyFire: Automated Chemical Classification With A Comprehensive, Computable Taxonomy. Journal of Cheminformatics, 2016, 8:61. DOI: 10.1186/s13321-016-0174-y

Mechanisms of Action

Mechanism of Action	Action Type	target ID	Target Name	Target Type	Target Organism	Binding Site Name	References

Names and Identifiers

Pubchem Sid	504756220
Pubchem Sid Url	https://pubchem.ncbi.nlm.nih.gov/substance/504756220
IUPAC Name	1,1-dioxospiro[2,1λ6-benzoxathiole-3,9'-xanthene]-3',4',5',6'-tetrol
INCHI	InChI=1S/C19H12O8S/c20-12-7-5-10-17(15(12)22)26-18-11(6-8-13(21)16(18)23)19(10)9-3-1-2-4-14(9)28(24,25)27-19/h1-8,20-23H
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
Isomeric 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
Molecular Weight	400.36
Beilstein	19407
Reaxy-Rn	363738

Certificates（CoA,COO,BSE/TSE and Analysis Chart)

C of A & Other Certificates(BSE/TSE, COO):

Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

4 results found

Lot Number	Certificate Type	Date	Item
H2203565	Certificate of Analysis	May 07, 2025	P169580
H2203564	Certificate of Analysis	May 07, 2025	P169580
J2113236	Certificate of Analysis	Jul 10, 2024	P169580
J2113256	Certificate of Analysis	Jul 10, 2024	P169580

Chemical and Physical Properties

Solubility	Soluble in water, ammonium hydroxide (10 mg/ml), and ethanol.
Sensitivity	Moisture sensitive.
Melt Point(°C)	≥300 °C
Molecular Weight	400.400 g/mol
XLogP3	2.100
Hydrogen Bond Donor Count	4
Hydrogen Bond Acceptor Count	8
Rotatable Bond Count	0
Exact Mass	400.025 Da
Monoisotopic Mass	400.025 Da
Topological Polar Surface Area	142.000 Å²
Heavy Atom Count	28
Formal Charge	0
Complexity	690.000
Isotope Atom Count	0
Defined Atom Stereocenter Count	0
Undefined Atom Stereocenter Count	0
Defined Bond Stereocenter Count	0
Undefined Bond Stereocenter Count	0
The total count of all stereochemical bonds	0
Covalently-Bonded Unit Count	1

Citations of This Product

How to Cite Aladdin Scientific Products?

1. Yanmei Zhu, Fushuang Xiang, Yuanyuan Su, Xue Jiang, Yipeng Cang, Wanjun Long, Wei Lan, Gaoqiong Deng, Hengye Chen, Yuanbin She, Haiyan Fu. (2023) Authenticity identification of high – Temperature Daqu Baijiu through multi-channel visual array sensor of organic dyes combined with smart phone App. FOOD CHEMISTRY, (137980).

Solution Calculators

Molarity Calculator

Determine the necessary mass, volume, or concentration for preparing a solution.

Mass

Concentration

Volume

M. Wt*

g/mol

*When preparing stock solutions, always use the batch-specific molecular weight of the product found on the vial label and the Certificate of Analysis (available online).

Dilution Calculator

Determine the dilution needed to prepare a stock solution.

Concentration 1 (C1)

Volume 1 (V1)

Concentration 2 (C2)

Volume 2 (V2)

Reconstitution Calculator

The reconstitution calculator enables you to quickly determine the volume of a reagent needed to reconstitute your vial. Just enter the mass of the reagent and the target concentration, and the calculator will do the rest.

Volume (to add to vial)

Mass (in vial)

Desired Reconstitution Concentration

Reviews

Shall we send you a message when we have discounts available?

Remind me later

Thank you! Please check your email inbox to confirm.

Oops! Notifications are disabled.