626-95-9

Basic information

• Product Name: 1,4-Pentanediol
• Synonyms: 1,4-Dihydroxy-1-methylbutane;1,4-Dihydroxypentane; 2,5-Pentanediol; 4-Hydroxy-1-pentanol
• CAS NO: 626-95-9
• Molecular Formula: C₅H₁₂O₂
• Molecular Weight: 104.1476
• EINECS: 210-973-5
• Product Categories: Organic Building Blocks;Oxygen Compounds;Polyols;Building Blocks;Chemical Synthesis;Organic Building Blocks;Oxygen Compounds
• Mol File: 626-95-9.mol
• Article Data: 152

Chemical Properties

• Melting Point: 50.86°C (estimate)
• Boiling Point: 72-73 °C0.03 mm Hg(lit.)
• Flash Point: >230 °F
• Appearance: /
• Density: 0.986 g/mL at 25 °C(lit.)
• Vapor Pressure: 0.00029mmHg at 25°C
• Refractive Index: 1.443
• Storage Temp.: Inert atmosphere,Room Temperature
• Solubility: Chloroform, Methanol (Sparingly)
• PKA: 15.09±0.20(Predicted)
• Stability: Hygroscopic
• CAS DataBase Reference: 1,4-Pentanediol(CAS DataBase Reference)
• NIST Chemistry Reference: 1,4-Pentanediol(626-95-9)
• EPA Substance Registry System: 1,4-Pentanediol(626-95-9)

Safety Data

• Safety Statements: S24/25:Avoid contact with skin and eyes.
• WGK Germany: 3
• Hazardous Substances Data: 626-95-9(Hazardous Substances Data)

Usage

Uses

Different sources of media describe the Uses of 626-95-9 differently. You can refer to the following data:
1. 1,4-Pentanediol is a useful synthetic intermediate. It was used in the preparation of poly(ortho ester). 1,4-Pentanediol on dehydration in water at 573K yields five-membered ether, 2-methyltetrahydrofuran.
2. 1,4-Pentanediol was used in the preparation of poly(ortho ester).

Synthesis Reference(s)

Journal of the American Chemical Society, 69, p. 1961, 1947 DOI: 10.1021/ja01200a036

General Description

1,4-Pentanediol on dehydration in water at 573K yields five-membered ether, 2-methyltetrahydrofuran.

InChI:InChI=1/C5H12O2/c1-5(7)3-2-4-6/h5-7H,2-4H2,1H3

Upstream product

• 534-22-5 2-methylfuran 
• 591-11-7 5-methyl-5H-furan-2-one 
• 626-92-6 1,4-dichloropentane 
• 927-57-1 pent-2-yne-1,4-diol 
• 123-76-2 levulinic acid 
• 539-88-8 4-oxopentanoic acid ethyl ester 
• 108-29-2 5-methyl-dihydro-furan-2-one 
• 111-02-4 2,6,10,15,19,23-hexamethyltetracosa-2,6,10,14,18,22-hexaene 
• 1071-73-4 5-Hydroxy-2-pentanone 
• 6753-98-6 α-caryophyllene 
• 19953-93-6 (2Z,6E,13E)-3,8,8,14,18-pentamethyl-11-methylene-nonadeca-2,6,13,17-tetraen-1-ol 
• 75-07-0 acetaldehyde 
• 615-79-2 ethyl 2,4-diketopentanoate 
• 110-87-2 3,4-dihydro-2H-pyran 

Downstream Products

• 96-47-9 2-methyltetrahydrofuran 
• 6032-29-7 (+/-)-2-pentanol 
• 504-60-9 penta-1,3-diene 
• 13532-37-1 4-hydroxyvaleric acid 
• 35096-45-8 4-chloropentan-1-ol 
• 626-87-9 1,4-dibromopentane 
• 1071-73-4 5-Hydroxy-2-pentanone 
• 108-29-2 5-methyl-dihydro-furan-2-one 
• 94309-71-4 (+/-)-1,4-bis-phenylcarbamoyloxy-pentane 
• 5412-69-1 5-diethylaminopentan-2-ol 
• 74500-57-5 (S)-4-t-butyldimethylsilyloxy-1-trityloxypentane 
• 73476-15-0 5-Tritylonoxy-2-pentanol 
• 77588-18-2 1,4-Bis(tritylonoxy)pentan 
• 74500-56-4 1,4-pentanediol monotrityl ether 

Relevant articles and documents

Partially biobased polymers: The synthesis of polysilylethers via dehydrocoupling catalyzed by an anionic iridium complex

Partially biobased polysilylethers (PSEs) are synthesized via dehydrocoupling polymerization catalyzed by an anionic iridium complex. Different types (AB type or AA and BB type) of monomers are suitable. Levulinic acid (LA) and succinic acid (SA) have been ranked within the top 10 chemicals derived from biomass. BB type monomers (diols) derived from LA and SA have been applied to the synthesis of PSEs. The polymerization reactions employ an air-stable anionic iridium complex bearing a functional bipyridonate ligand as catalyst. Moderate to high yields of polymers with number-average molecular weights (Mn) up to 4.38 × 104 were obtained. A possible catalytic cycle via an Ir-H species is presented. Based on the results of kinetic experiments, apparent activation energy of polymerization in the temperature range of 0–10 °C is about 38.6 kJ/mol. The PSEs synthesized from AA and BB type monomers possess good thermal stability (T5 = 418 °C to 437 °C) and low glass-transition temperature (Tg = ?49.6 °C).

Transformation of γ-valerolactone into 1,4-pentanediol and 2-methyltetrahydrofuran over Zn-promoted Cu/Al2O3catalysts

The transformation of γ-valerolactone (GVL) into 1,4-pentanediol (1,4-PDO) and 2-methyltetra-hydrofuran (2-MTHF) in the presence of H2, one of the useful biomass conversion and utilization processes, was investigated with monometallic Cu/Al2O3 and bimetallic ZnCu/Al2O3 catalysts. A 10 wt% Cu-loaded monometallic catalyst produced 1,4-PDO and 2-MTHF in comparable quantities at a medium conversion (～50%). When Zn was added in a range of Zn/Cu molar ratios of up to 2, in contrast, the catalysts yielded 1,4-PDO in a high selectivity of about 97% at low and high conversion levels. In addition, the 1,4-PDO selectivity over the ZnCu/Al2O3 catalysts remained almost unchanged during recycled runs. That is, the addition of Zn to Cu/Al2O3 switched the product selectivity and improved the catalyst stability and reusability. Furthermore, the physicochemical properties of the catalysts were characterized by several methods including XRD, TEM, TPR, XPS, FTIR of adsorbed pyridine, and so on. On the basis of those results, the relationships between the catalytic performance (activity, selectivity, and reusability) and the catalyst structural features were discussed.

METHOD FOR PRODUCING ALCOHOL

The present invention provides a method for selectively producing an alcohol by efficiently hydrogenating a lactone. The present invention is a method for producing an alcohol, the method including hydrogenating a substrate lactone represented by Formula (1), in the presence of a catalyst described below, to produce an alcohol that is represented by Formula (2). In the formulae, R represents a divalent hydrocarbon group which may have a hydroxyl group. The catalyst comprises: metal species including M1 and M2; and a support supporting the metal species, and wherein M1 is rhodium, platinum, ruthenium, iridium, or palladium; M2 is tin, vanadium, molybdenum, tungsten, or rhenium; and the support is hydroxyapatite, fluorapatite, hydrotalcite, or ZrO2.

Synthesis and characterisation of a range of Fe, Co, Ru and Rh triphos complexes and investigations into the catalytic hydrogenation of levulinic acid

The coordination chemistry of the N-triphos ligand (NP3Ph, 1b) has been investigated with a range of Fe, Co and Rh precursors and found to form either tridentate or bidentate complexes. Reaction of NP3Ph with [Rh(COD)(CH3CN)2]BF4 resulted in the formation of the tridentate complex [Rh(COD)(κ3-NP3Ph)]BF4 (3) in the solid state, however, in solution a bidentate complex predominates in more polar solvents. Reaction of NP3Ph with Fe carbonyl precursors revealed the formation of the bidentate complexes [Fe(CO)3(κ1,κ2-NP3Ph)Fe(CO)4] (4) and [Fe(CO)3(κ2-NP3Ph)] (5), while reaction with FeBr2 resulted in the paramagnetic bidentate complex [Fe(Br)2(κ2-NP3Ph)] (6). Reaction of NP3Ph with CoCl2 gave a dimeric Co species [(κ2-NP3Ph)CoCl(κ1,κ2-NP3Ph)CoCl3] (7), while Zn powder reduction of NP3Ph Co halides resulted in the formation of the tridentate complexes of the type: [Co(X)(κ3-NP3Ph)]. The related triphos Ru complex, [Ru(CO3)(CO)(κ3-CP3Ph)] (2), has also been isolated and characterised. Preliminary catalytic hydrogenation of levulinic acid (LA) was conducted with 2 and 3. The Ru complex was found to be catalytically active, giving high conversions of LA to form gamma-vvvalerolactone (GVL) and 1,4-pentanediol (1,4-PDO), while 3 was found to be catalytically inactive. In situ catalytic testing with 1b and Fe(BF4)2.6H2O resulted in low conversions of LA while a combination of 1b and Co(BF4)2.6H2O gave high conversions to GVL.

MOF-derived hcp-Co nanoparticles encapsulated in ultrathin graphene for carboxylic acids hydrogenation to alcohols

Highly efficient conversion of carboxylic acids to valuable alcohols is a great challenge for easily corroded non-noble metal catalysts. Here, a series of few-layer graphene encapsulated metastable hexagonal closed-packed (hcp) Co nanoparticles were fabricated by reductive pyrolysis of metal-organic framework precursor. The sample pyrolyzed at 400 °C (hcp-Co@G400) presented outstanding performance and stability for converting a variety of functional carboxylic acids and its turnover frequency was one magnitude higher than that of conventional facc-centered cubic (fcc) Co catalysts. In situ DRIFTS spectroscopy of model reaction acetic acid hydrogenation and DFT calculation results confirm that carboxylic acid initially undergoes dehydroxylation to RCH2CO* followed by consecutive hydrogenation to RCH2CH2OH through RCH2COH*. Acetic acid prefers to vertically adsorb at hcp-Co (0 0 2) facet with a much lower adsorption energy than parallel adsorption at fcc-Co (1 1 1) surface, which plays a key role in decreasing the activation barrier of the rate-determining step of acetic acid dehydroxylation.