1,2-PENTANEDIOL

PRODUCT IDENTIFICATION
CAS NO. 5343-92-0; 91049-43-3

1,2-PENTANEDIOL
EINECS NO. 226-285-3
FORMULA CH3CH2CH2CH(OH)CH2OH
MOL WT. 104.15

H.S. CODE

  
TOXICITY  
SYNONYMS Pentane-1,2-diol;
DERIVATION  

CLASSIFICATION

DIOLS

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE clear to yellowish liquid
MELTING POINT  
BOILING POINT 206 C
SPECIFIC GRAVITY 0.97
SOLUBILITY IN WATER  
pH  
VAPOR DENSITY  

AUTOIGNITION

 

NFPA RATINGS

  

REFRACTIVE INDEX

 1.4387 - 1.4407
FLASH POINT 104 C
STABILITY stable under ordinary conditions. Hygroscopic

GENERAL DESCRIPTION AND APPLICATIONS
Glycol: any of a class of organic chemicals characterized by having separate two hydroxyl (-OH) groups, contribute to high water solubility, hygroscopicity and reactivity with many organic compounds, on usually linear and aliphatic carbon chain. The general formula is CnH2n(OH)2 or (CH2)n(OH)2. The broadened names include diols, dihydric alcohols, and dihydroxy alcohols. Ethylene glycol, HOCH2CH2OH, is the simplest member of the glycol family. Mono-, di- and triethylene glycols are the first three members of a homologous series of dihydroxy alcohols. Propylene glycol prepared by hydrolysis of propylene oxide and widely used as an ingredient of antifreeze and humectant in cosmetics is 1,2-propanediol indicating the two hydroxyl group position at 1,2, while trimethylene glycol is 1,3-propanediol with two hydroxyl group on the primary carbon atoms.

Diols contribute to high water solubility, hygroscopicity and reactivity with many organic compounds, on usually linear and aliphatic carbon chain. Alcohols are very weak acids as they lose H+ in the hydroxyl group. Alcohols undergoes dehydration reaction which means the elimination of water molecule  replaced by a pi bond between two adjacent carbon atoms to form alkenes under heating in the presence of strong acids like hydrocloric acid or phosphoric acid. Primary and secondary alcohols can be oxidized to aldehydes and ketones respectively. Carboxylic acids are obtained from oxidation of aldehydes. Oxidation in organic chemistry can be considered to be the loss of hydrogen or gain of oxygen and reduction to gain hydrogen or loss of oxygen. Tertiary alcohols do not react to give oxidation products as they have no H attached to the alcohol carbon. Alcohols undergoes important reactions called nucleophilic substitution in which an electron donor replaces a leaving group, generally conjugate bases of strong acids, as a covalent substitute of some atom. One of important reaction of alcohol is condensation. Ethers are formed by the condensation of two alcohols by heating with sulfuric acid; the reaction is one of dehydration. Almost infinite esters are formed through condensation reaction called esterification between carboxylic acid and alcohol, which produces water. Alcohols are important solvents and chemical raw materials. Alcohols are intermediates for the production of target compounds, such as pharmaceuticals, veterinary medicines, plasticizers, surfactants, lubricants, ore floatation agents, pesticides, hydraulic fluids, and detergents.

Pentanediol

CAS RN

 EINECS Boiling Point n20/D

Density

Pentane-1,2-diol

 5343-92-0; 91049-43-3 226-285-3 206 C 1.4397 0.971

Pentane-1,3-diol

 3174-67-2

 

 

 

 

Pentane-1,4-diol

 626-95-9 210-973-5 202 C 1.4468 0.986

Pentane-1,5-diol

 111-29-5 203-854-4 239 - 242 C 1.4494 0.994

Pentane-2,3-diol

 42027-23-6

255-632-1

 187 - 188 C

 

 

Pentane-2,4-diol

 625-69-4 210-907-5 201-202 C 1.435 0.95
SALES SPECIFICATION

APPEARANCE

clear to yellowish liquid

PURITY

99.0% min

MOISTURE

0.5% max

TRANSPORTATION
PACKING 190kgs in drum
HAZARD CLASS  
UN NO.  
OTHER INFORMATION
Hazard Symbols: XI, Risk Phrases: 36/38, Safety Phrases: 26-36