PYROGALLOL RED
- CAS No.
- 32638-88-3
- Chemical Name:
- PYROGALLOL RED
- Synonyms
- PR;PYROGALLOLUM;PYROGALLOL RED;PyrogallolRedGr;PYROGALLIC ACID;PYROGALLOL RED AR;PYROGALLIC ACID RED;1,2,3-BENZENETRIOL RED;PYROGALLOL RED-LACTONE;Pyrogallol Red,98%,pure
- CBNumber:
- CB1314191
- Molecular Formula:
- C19H12O8S
- Molecular Weight:
- 400.36
- MDL Number:
- MFCD00005046
- MOL File:
- 32638-88-3.mol
- MSDS File:
- SDS
| Melting point | 133-134 °C(lit.) |
|---|---|
| Boiling point | 309 °C(lit.) |
| Density | 1.082 g/mL at 20 °C |
| vapor density | 4.4 (vs air) |
| vapor pressure | 10 mm Hg ( 167.7 °C) |
| refractive index |
n |
| storage temp. | Inert atmosphere,Room Temperature |
| pka | 7.86±0.20(Predicted) |
| form | Liquid |
| color | Dark brown |
| Water Solubility | Soluble in water, ammonium hydroxide (10 mg/ml), and ethanol. |
| BRN | 363738 |
| CAS DataBase Reference | 32638-88-3 |
| EPA Substance Registry System | Spiro[3H-2,1-benzoxathiole-3,9'-[9H]xanthene]-3',4',5',6'-tetrol, 1,1-dioxide (32638-88-3) |
SAFETY
Risk and Safety Statements
| Hazard Codes | Xn,Xi | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Risk Statements | 20/21/22-52/53-68-36/37/38 | |||||||||
| Safety Statements | 36/37-61-24/25-22-36-26 | |||||||||
| RIDADR | UN 2811 6.1/PG 3 | |||||||||
| WGK Germany | 3 | |||||||||
| RTECS | UX2800000 | |||||||||
| F | 8 | |||||||||
| TSCA | Yes | |||||||||
| HS Code | 2934 99 90 | |||||||||
| NFPA 704 |
|
PYROGALLOL RED price More Price(15)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | P8759 | Pyrogallol Red | 32638-88-3 | 5g | $198 | 2024-03-01 | Buy |
| Sigma-Aldrich | 1.07534 | Pyrogallol red metal indicator | 32638-88-3 | 1g | $232 | 2024-03-01 | Buy |
| TCI Chemical | P0572 | Pyrogallol Red | 32638-88-3 | 1g | $53 | 2024-03-01 | Buy |
| TCI Chemical | P0572 | Pyrogallol Red | 32638-88-3 | 5g | $151 | 2024-03-01 | Buy |
| TCI Chemical | P1976 | Pyrogallol Red [for Protein Research] | 32638-88-3 | 1g | $106 | 2024-03-01 | Buy |
PYROGALLOL RED Chemical Properties,Uses,Production
Chemical Properties
Also know nas pyrogallol and 1,2,3-trihydroxy-benzene,C6H3(OH)3 is white,lustrous crystals that turn gray on exposure to light. It is soluble in water,alcohol,and ether. A solution of pyrogallol acquires a brown color on exposure to air. This absorption of oxygen and change of color take place rapidly when the solution is made alkaline. Derivation is by heating gallic acid in an autoclave with three times its weight of water.
Uses are as a protective colloid in preparation of metallic colloidal solutions, photography, dyes, intermediates, synthetic drugs, medicine (antibacterial), process engraving, laboratory reagent, gas analysis (an oxygen absorber), reducing agent, and antioxidant in lubricating oils.
Chemical Properties
dark brown powder
Uses
The white powdery crystal was made by the superheating of gallic acid. Pyrogallic acid, popularly known as pyro, is one of the earliest developers and its use has spanned three centuries. It was first used in an acid state to physically develop wet collodion negatives. When silver bromide gelatin plates were adopted pyro was used again but in an alkaline state for chemical development. It was used throughout the 20th century and often chosen for the peculiar yellow stain it imparted to gelatin negatives.
Uses
Pyrogallol Red is a complexometric indicator for the metal elements molybdenum and copper. Dyes and metabolites.
Purification Methods
It is recrystallised from aqueous alkaline solution (Na2CO3 or NaOH) by precipitation on acidification, filter it off and dry in a vacuum. [Suk Collect Czech Chem Commun 31 3127 1966, Beilstein 19 H 407, 19 II 417, 19 III/IV 599, 19/10 V 226.]
PYROGALLOL RED Preparation Products And Raw materials
Raw materials
Preparation Products
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| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Hebei Yanxi Chemical Co., Ltd. | +8617531190177 | peter@yan-xi.com | China | 6000 | 58 |
| career henan chemical co | +86-0371-86658258 15093356674; | factory@coreychem.com | China | 29826 | 58 |
| Hefei TNJ Chemical Industry Co.,Ltd. | 0551-65418671 | sales@tnjchem.com | China | 34572 | 58 |
| Dayang Chem (Hangzhou) Co.,Ltd. | 571-88938639 +8617705817739 | info@dycnchem.com | CHINA | 52867 | 58 |
| ShanDong Look Chemical Co.,Ltd. | +8617653113219 | sales01@sdlookchemical.com | China | 2739 | 58 |
| Alfa Chemistry | +1-5166625404 | Info@alfa-chemistry.com | United States | 21317 | 58 |
| Hebei Duling International Trade Co. LTD | +8618712993135 | sales01@hbduling.cn | China | 15741 | 58 |
| LEAP CHEM CO., LTD. | +86-852-30606658 | market18@leapchem.com | China | 24738 | 58 |
| Hangzhou MolCore BioPharmatech Co.,Ltd. | +86-057181025280; +8617767106207 | sales@molcore.com | China | 49739 | 58 |
| Hebei Guanlang Biotechnology Co., Ltd. | +86-19930503259 +86-19930503259 | cherry@crovellbio.com | China | 18451 | 58 |
View Lastest Price from PYROGALLOL RED manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2023-10-09 | PYROGALLOL RED
32638-88-3
|
US $40.00-40.00 / kg | 1kg | 0.99 | 10 tons | Hebei Yanxi Chemical Co., Ltd. | |
 |
2023-09-06 | PYROGALLOL RED
32638-88-3
|
US $0.00 / KG | 1KG | 99% | 500000kg | Hebei Guanlang Biotechnology Co., Ltd. | |
 |
2020-01-10 | PYROGALLOL RED
32638-88-3
|
US $1.00 / KG | 1KG | 98% | 200kgs | Career Henan Chemical Co |
-
- PYROGALLOL RED
32638-88-3
- US $40.00-40.00 / kg
- 0.99
- Hebei Yanxi Chemical Co., Ltd.
-
- PYROGALLOL RED
32638-88-3
- US $0.00 / KG
- 99%
- Hebei Guanlang Biotechnology Co., Ltd.
-
- PYROGALLOL RED
32638-88-3
- US $1.00 / KG
- 98%
- Career Henan Chemical Co
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