Name: Pyrogallol
Cas: 87-66-1
Purity: 99%min
MOQ: 1KG
Chemical Structure
Chapter 1: Basic Info
| Pyrogallol Chemical Properties |
| Melting point | 43-47 °C(lit.) |
| Boiling point | 309 °C |
| density | 1.112 g/mL at 25 °C(lit.) |
| vapor density | 4.4 (vs air) |
| vapor pressure | 10 mm Hg ( 167.7 °C) |
| refractive index | n20/D 1.387 |
| Fp | >230 °F |
| storage temp. | Store below +30°C. |
| solubility | water: soluble |
| pka | pK1:9.03(0);pK2:11.63(+1) (25°C) |
| form | Very Fine Crystalline Powder |
| color | White |
| PH | 4-5 (50g/l, H2O, 20℃) |
| Water Solubility | 400 g/L (25 ºC) |
| Sensitive | Light Sensitive |
Chapter 2: Pyrogallol Product Introduction
Pyrogallol (CAS 87-66-1): High-Purity Polyphenolic Compound for Industrial & Laboratory Applications
Pyrogallol (also known as 1,2,3-Trihydroxybenzene or Pyrogallic Acid) is a white to off-white crystalline powder widely recognized for its strong reducing properties and exceptional oxygen-absorption capacity. Synthesized through controlled decarboxylation of gallic acid or specialized organic processes, this high-purity polyphenolic compound serves as a critical raw material across chemical synthesis, analytical testing, photography, and electronics manufacturing.
Due to its high reactivity with dissolved oxygen in alkaline solutions, Pyrogallol acts as a reliable reducing agent, antioxidant, and chemical intermediate. Our manufacturing process ensures low ash content, minimal trace metal impurities, and consistent particle size distribution, making it suitable for both bulk industrial processes and sensitive laboratory-scale formulations.
Chapter 3: Nature and Specifications
Product Name: Pyrogallol Synonyms: 1,2,3-Trihydroxybenzen;1,2,3-trihydroxy-benzen;1,2,3-trihydroxybenzen(czech);1,2,3-trihydroxybenzene(pyrogallol);2,3-Dihydroxyphenol;Benzene, 1,2,3-trihydroxy-;benzene-1,2,3-triol;C.I. Oxidation Base 32 CAS: 87-66-1 MF: C6H6O3 MW: 126.11 EINECS: 201-762-9
| Item | Specification |
| Product Name | Pyrogallol |
| CAS No. | 87-66-1 |
| Appearance | White powder |
| Shelf Life | 2 years |
| Packing | 1kg/bag,25kg/bag or as your requirements |
Product Packaging
Chapter 4: Product Usage
Pyrogallol’s distinct chemical reactivity makes it indispensable across diverse industrial sectors:
Gas Analysis & Environmental Testing: Employed in alkaline solutions within Orsat gas analysis equipment for precise volumetric measurement and absorption of oxygen.
Chemical Synthesis & Intermediates: Serves as a versatile building block in the synthesis of pharmaceuticals, agrochemicals, dyes, and specialized polymers.
Photographic & Microelectronic Chemicals: Acts as a classic developing agent in specialized black-and-white photography formulations and image-processing chemicals.
Antioxidant & Stabilizer: Applied as an antioxidant in industrial formulations, rubber manufacturing, and synthetic resins to inhibit oxidative degradation.
Nutraceutical & Tannin Chemistry Research: Used as a reference standard and reactant in tannic acid derivatives and polyphenolic reaction studies.
Quality Certifications & Regulatory Compliance
To meet international regulatory requirements and support seamless global distribution, our Pyrogallol production complies with stringent chemical management frameworks.
ISO 9001:2015 & ISO 14001:2015: Certified quality management and environmental protection standards across manufacturing and packaging lines.
REACH Compliance: Regulatory documentation aligned for industrial users within the European Union market.
GHS / CLP Standard Labeling: Fully hazard-classified and labeled according to international Globally Harmonized System requirements.
Comprehensive Dossier Support: Technical documentation packages available upon request, including Safety Data Sheet (SDS), Certificate of Analysis (COA) per batch, Origin Certificate, and Transport Safety Assessment reports.
Every production lot undergoes rigorous multi-stage quality control testing in our analytical laboratory to ensure conformity with strict technical specifications.
Purity Determination (HPLC / GC): High-Performance Liquid Chromatography is used to verify active Pyrogallol content, keeping organic impurities below strict threshold limits.
Melting Point Range Testing: Measured via automated melting point apparatus (typically 131°C – 135°C) to confirm structural purity and batch uniformity.
Residue on Ignition (Ash Content): Thermogravimetric assessment to ensure inorganic non-combustible residue remains below 0.1%.
Heavy Metals & Trace Elements (ICP-OES): Screening for heavy metal contaminants (such as Lead, Arsenic, and Iron) to satisfy technical requirements for electronics and fine chemical applications.
Loss on Drying (Moisture Content): Karl Fischer titration or vacuum drying protocols to control residual moisture and preserve storage stability.
Chapter 6: Our Advantage
Zhishang Chemical is based in Shandong, serves the whole country, faces the world, and is determined to become an excellent supplier and service provider in the chemical industry.
As a top manufacturer of cosmetic raw materials, disinfectants, flavors and fragrances in China, we are committed to producing high-quality products and have won high praise from customers all over the world.
In the next 10 years or even longer, Zhishang will always adhere to the tenet of quality first and reputation first, and devote itself to providing customers with thoughtful and perfect services.
Pre-Sales Service
* Timely reply and 24 hours online, the professional team will provide you with the most favorable prices and high-quality products.
* The sample supports testing and inspection.
* Each batch of products will be tested to ensure that its quality meets user needs.
*Packaging can also be made according to customer requirements.
*Any inquiries will be answered by our relevant personnel within 24 hours.
*We will provide you with commercial invoice, packing list, packing list, COA, health certificate and certificate of origin if you need it. If your market has other special requirements, please let us know.
After-Sales Service
*We will monitor the logistics information in real time and will share the information with you.
* You can consult us at any time if you have any questions about the product, and we will answer you in time.
*If you have any questions about the product, you can report it to us, we will deal with it in time for you, and the product can be returned.
Q1: Why does Pyrogallol change color over time, and how should it be stored? A: Pyrogallol is inherently sensitive to oxygen and light, causing its surface to darken (from white to light brown) upon prolonged air exposure. To preserve material integrity, store it in tightly sealed, light-resistant containers under a cool, dry, and well-ventilated environment away from strong oxidizing agents and bases.
Q2: What is the main function of Pyrogallol in gas absorption applications? A: In an alkaline aqueous medium, Pyrogallol rapidly reacts with oxygen to form complex oxidized species, making it an efficient reagent for trapping free oxygen in gas streams or analytical absorption tubes.
Q3: Can custom particle sizes or bulk packaging options be provided? A: Yes, we supply Pyrogallol in standard 25 kg fiber drums lined with double PE moisture-barrier bags. Custom packaging options and specific mesh sizes can be arranged upon technical evaluation.
Q4: Is Pyrogallol stable under standard handling conditions? A: The compound is thermally stable under ambient conditions when dry and kept sealed. However, contact with strong oxidizers or alkaline exposure in the presence of air should be avoided during handling to prevent unintended oxidation.
1. For products ≤50kg, we recommend using express delivery, which is usually called DDU service (discounted, convenient).
2. For products ≤500kg, we generally recommend air freight, which is usually called FOB, CFR or CIF service (fast and efficient).
3. For products >500kg, we generally recommend shipping by sea, which is usually called FOB, CFR or CIF service (economical, safe).
4. For high-value products, please choose air or express to ensure the safety of product transportation.