ChemicalBook > CAS DataBase List > Pyridinium dichromate
Pyridinium dichromate
- Product Name
- 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
- Formula Weight
- 297.1
- MOL File
- 20039-37-6.mol
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Pyridinium dichromate Property
- 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)
- EPA Substance Registry System
- Chromic acid (H2Cr2O7), compd. with pyridine (1:2) (20039-37-6)
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Safety
- 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
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Hazard and Precautionary Statements (GHS)
- Symbol(GHS)
-
- Signal word
- Danger
- Hazard statements
-
H228Flammable solid
H272May intensify fire; oxidizer
H314Causes severe skin burns and eye damage
H317May cause an allergic skin reaction
H410Very toxic to aquatic life with long lasting effects
- Precautionary statements
-
P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P260Do not breathe dust/fume/gas/mist/vapours/spray.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
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N-Bromosuccinimide Price
Sigma-Aldrich
- Product number
- 214698
- Product name
- Pyridinium dichromate
- Purity
- 98%
- Packaging
- 500g
- Price
- $85.8
- Updated
- 2024/03/01
Sigma-Aldrich
- Product number
- 214698
- Product name
- Pyridinium dichromate
- Purity
- 98%
- Packaging
- 100g
- Price
- $88.7
- Updated
- 2024/03/01
TCI Chemical
- Product number
- P0931
- Product name
- Pyridinium Dichromate
- Purity
- >98.0%(T)
- Packaging
- 25g
- Price
- $16
- Updated
- 2024/03/01
TCI Chemical
- Product number
- P0931
- Product name
- Pyridinium Dichromate
- Purity
- >98.0%(T)
- Packaging
- 100g
- Price
- $41
- Updated
- 2024/03/01
Alfa Aesar
- Product number
- L15132
- Product name
- Pyridinium dichromate, 98%
- Packaging
- 25g
- Price
- $30.65
- Updated
- 2024/03/01
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Pyridinium dichromate Chemical Properties,Usage,Production
Chemical Properties
Orange solid
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.
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.
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
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View Lastest Price from Pyridinium dichromate manufacturers
Hebei Weibang Biotechnology Co., Ltd
- Product
- Pyridinium dichromate 20039-37-6
- Price
- US $10.00/KG
- Min. Order
- 1KG
- Purity
- 99%
- Supply Ability
- 10 mt
- Release date
- 2024-11-07
R&D Scientific Inc.
- Product
- Pyridinium dichromate 20039-37-6
- Price
- US $590.00/Kg
- Min. Order
- 0.100Kg
- Purity
- 98
- Supply Ability
- 1000 Kg
- Release date
- 2024-10-04
Hebei Mojin Biotechnology Co., Ltd
- Product
- Pyridinium dichromate 20039-37-6
- Price
- US $0.00/kg
- Min. Order
- 1kg
- Purity
- 99%
- Supply Ability
- 1000tons
- Release date
- 2023-07-28
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