Pyridinium dichromate
- CAS No.
- 20039-37-6
- Chemical Name:
- Pyridinium dichromate
- Synonyms
- PDC;Escat? 11;Escat? 103;Cat.20569-9;C5H5NH+)2Cr2O72-;Cornforth reagent;PYRIDINE DICHROMATE;PYRIDINIUM DICHROMATE;PyridiniumDichromate>PyridiniuM dichroMate 98%
- CBNumber:
- CB4390259
- Molecular Formula:
- C5H7Cr2NO7
- Molecular Weight:
- 297.1
- MDL Number:
- MFCD00013105
- MOL File:
- 20039-37-6.mol
| Melting point | 152-153 °C(lit.) |
|---|---|
| Density | 1.71[at 20℃] |
| vapor pressure | 0Pa at 25℃ |
| storage temp. | Inert atmosphere,Room Temperature |
| solubility | soluble in DMSO |
| form | Crystalline Powder |
| color | Orange to brown |
| Water Solubility | soluble |
| Sensitive | Hygroscopic |
| Exposure limits |
OSHA: Ceiling 0.1 mg/m3 NIOSH: IDLH 15 mg/m3; TWA 0.0002 mg/m3 |
| InChIKey | BNSOYWDFFBDEFB-UHFFFAOYSA-L |
| LogP | -3.7 at 20℃ |
| CAS DataBase Reference | 20039-37-6(CAS DataBase Reference) |
| FDA UNII | Y7AV7UFN7K |
| EPA Substance Registry System | Chromic acid (H2Cr2O7), compd. with pyridine (1:2) (20039-37-6) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |       GHS02,GHS03,GHS05,GHS07,GHS08,GHS09 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Danger | |||||||||
| Hazard statements | H228-H272-H314-H317-H350i-H410 | |||||||||
| Precautionary statements | P210-P260-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338 | |||||||||
| Hazard Codes | O,T,N,Xn,F,Xi | |||||||||
| Risk Statements | 49-8-43-50/53-61-60-46-45-20/21/22-40-36/37/38-34-11 | |||||||||
| Safety Statements | 53-45-60-61-37-29-24-17-36/37/39-27-22-26 | |||||||||
| RIDADR | UN 1479 5.1/PG 2 | |||||||||
| WGK Germany | 2 | |||||||||
| F | 3 | |||||||||
| TSCA | Yes | |||||||||
| HazardClass | 5.1 | |||||||||
| PackingGroup | II | |||||||||
| HS Code | 29333100 | |||||||||
| NFPA 704 |
|
Pyridinium dichromate price More Price(28)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 214698 | Pyridinium dichromate 98% | 20039-37-6 | 500g | $85.8 | 2024-03-01 | Buy |
| Sigma-Aldrich | 214698 | Pyridinium dichromate 98% | 20039-37-6 | 100g | $88.7 | 2024-03-01 | Buy |
| TCI Chemical | P0931 | Pyridinium Dichromate >98.0%(T) | 20039-37-6 | 25g | $16 | 2024-03-01 | Buy |
| TCI Chemical | P0931 | Pyridinium Dichromate >98.0%(T) | 20039-37-6 | 100g | $41 | 2024-03-01 | Buy |
| Alfa Aesar | L15132 | Pyridinium dichromate, 98% | 20039-37-6 | 25g | $30.65 | 2024-03-01 | Buy |
Pyridinium dichromate Chemical Properties,Uses,Production
Chemical Properties
Orange solid
Uses
Pyridinium dichromate acts as a strong oxidizing agent used in the conversion of primary alcohols and secondary alcohols to aldehydes and ketones respectively. It plays an important role in the oxidation of unsaturated tertiary alcohols, silyl ethers, the carbon-boron bond, and oximes. Further, it is used in the conversion of acetals to esters and didehydroketones to enones in the presence of tert-butyl hydroperoxide.
Uses
Pyridinium dichromate (PDC) is an orange colored solid used as an oxidizing agent.
Oxidizing agent for conversion of primary alcohols to aldehydes and ketones, acetals to esters, and didehydroketones to enones in the presence of tert-butyl hydroperoxide.
Pyridinium Dichromate may be used as an alternative to PCC in nucleoside and carbohydrate oxidation, particularly for fragile molecules. PDC can also be used in conjunction with tertbutylhydroperoxide for a variety of oxidative transformations.
Definition
ChEBI: Pyridinium dichromate is a pyridinium salt that is the dipyridinium salt of dichromic acid. It is a strong oxidizing agent which can convert primary and secondary alcohols to aldehydes and ketones respectively. It has a role as an oxidising agent. It contains a dichromate(2-).
Preparation
Pyridinium dichromate can be obtained by gradual addition of a solution of chromic anhydride (Cr2O3) in water to pyridine in ice cold conditions.
Flammability and Explosibility
Flammable
Purification Methods
Dissolve it in the minimum volume of H2O and add 5 volumes of cold Me2CO and cool to -20o. After 3hours the orange crystals are collected, washed with a little cold Me2CO and dried in a vacuum. It is soluble in dimethylformamide (0.9g/mL at 25o), and in H2O, and has a characteristic IR with max at 930, 875, 765, 730 and 730 cm-1. [Corey & Schmidt Tetrahedron Lett 399 1979, Coats & Corrigan Chem Ind (London) 1594 1969.] (Possible CARCINOGEN.) § Available commercially on a polymer support.
Pyridinium dichromate Preparation Products And Raw materials
Raw materials
Preparation Products
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Hebei Weibang Biotechnology Co., Ltd | +8615531157085 | abby@weibangbio.com | China | 8810 | 58 |
| Hebei Mojin Biotechnology Co., Ltd | +86 13288715578 +8613288715578 | sales@hbmojin.com | China | 12839 | 58 |
| Capot Chemical Co.,Ltd. | +86-（0）57185586718 +86-13336195806 | sales@capot.com | China | 29791 | 60 |
| Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 | info@tianfuchem.com | China | 21634 | 55 |
| Hangzhou FandaChem Co.,Ltd. | +8615858145714 | FandaChem@Gmail.com | China | 9206 | 55 |
| Nanjing ChemLin Chemical Industry Co., Ltd. | 025-83697070 | product@chemlin.com.cn | CHINA | 3009 | 60 |
| ATK CHEMICAL COMPANY LIMITED | +undefined-21-51877795 | ivan@atkchemical.com | China | 32957 | 60 |
| career henan chemical co | +86-0371-86658258 +8613203830695 | sales@coreychem.com | China | 29881 | 58 |
| Chongqing Chemdad Co., Ltd | +86-023-6139-8061 +86-86-13650506873 | sales@chemdad.com | China | 39894 | 58 |
| CONIER CHEM AND PHARMA LIMITED | +8618523575427 | sales@conier.com | China | 49374 | 58 |
View Lastest Price from Pyridinium dichromate manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2024-11-07 | Pyridinium dichromate
20039-37-6
|
US $10.00 / KG | 1KG | 99% | 10 mt | Hebei Weibang Biotechnology Co., Ltd | |
 |
2024-10-06 | Pyridinium dichromate
20039-37-6
|
US $590.00 / Kg | 0.100Kg | 98 | 1000 Kg | R&D Scientific Inc. | |
 |
2024-04-29 | Cornforth reagent
20039-37-6
|
US $5.00 / kg | 1kg | 99.92% | 50000tons | Ouhuang Engineering Materials (Hubei) Co., Ltd |
-
- Pyridinium dichromate
20039-37-6
- US $10.00 / KG
- 99%
- Hebei Weibang Biotechnology Co., Ltd
-
- Pyridinium dichromate
20039-37-6
- US $590.00 / Kg
- 98
- R&D Scientific Inc.
-
- Cornforth reagent
20039-37-6
- US $5.00 / kg
- 99.92%
- Ouhuang Engineering Materials (Hubei) Co., Ltd