(R,R)-(−)-2,4-Pentanediol

CAS 42075-32-1CH3CH(OH)CH2CH(OH)CH3Chemical Synthesis

(R,R)-(−)-2,4-Pentanediol (CAS 42075-32-1) is a chiral diol with the molecular formula CH3CH(OH)CH2CH(OH)CH3 and a molecular weight of 104.15 g/mol. It serves as a versatile building block and chiral auxiliary in asymmetric synthesis. This compound is particularly effective as an acetalization reagent for ketones and beta-keto esters, and is utilised in the production of optically active polyesters.

Synonyms: 42075-32-1CH3CH(OH)CH2CH(OH)CH3

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(R,R)-(−)-2,4-Pentanediol (CH3CH(OH)CH2CH(OH)CH3) — chemical structure, CAS 42075-32-1; Chemistry, fine chemical supplied by Tech Serve Solutions

Asymmetric SynthesisChemical SynthesisChiral Building BlocksOrganic Building BlocksPolyols

01 /Applications

Chiral Auxiliary and Building Block

Possessing C2 symmetry, this diol functions as an effective chiral auxiliary and a valuable building block in stereoselective organic synthesis, enabling the construction of complex chiral molecules.

Acetalization Reagent

It is employed as an acetalization reagent for various ketones and beta-keto esters, facilitating the formation of chiral acetals crucial in further synthetic transformations.

Polyester Synthesis

The compound finds application in the synthesis of optically active polyesters, contributing to the development of chiral polymeric materials with specific stereochemical properties.

Chiral Ligand Development

Its structure lends itself to the design and synthesis of chiral ligands, which are essential components in asymmetric catalysis for various chemical reactions.

02 /Properties

Molecular weight	104.15
Linear formula	CH3CH(OH)CH2CH(OH)CH3
Assay	99%
Boiling point	111-113 °C/19 mmHg(lit.)
Optical activity	[α]21/D −40.4°, c = 10 in chloroform
Optical purity	ee: 97% (GLC)
Application	Acetalization reagent for ketones1 and β-keto esters.2 Used in the synthesis of optically active polyesters.3 C2 symmetric chiral diol with versatile applications as a chiral auxiliary,4,5 building block,6,7,8 and chiral ligand.9,10
Melting point	48-50 °C(lit.)

03 /Safety & handling

Protective equipment	Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter
Flash point	101 °C / 213.8 °F
Water hazard class (WGK, DE)	3

Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.

04 /Identifiers & registry

CAS number

42075-32-1

MDL number

MFCD00063893

PubChem substance

24854603

Beilstein registry

4290613

05 /Quality & supply

Documentation

Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.

Supply & logistics

Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.

06 /Frequently asked questions

What is (R,R)-(−)-2,4-Pentanediol used for?

(R,R)-(−)-2,4-Pentanediol is used as an acetalization reagent for ketones and beta-keto esters, in the synthesis of optically active polyesters, and as a chiral auxiliary, building block, and chiral ligand in asymmetric synthesis.

What is the CAS number and formula for (R,R)-(−)-2,4-Pentanediol?

The CAS number is 42075-32-1 and the linear formula is CH3CH(OH)CH2CH(OH)CH3.

What grade and purity does Tech Serve Solutions supply?

Tech Serve Solutions supplies (R,R)-(−)-2,4-Pentanediol with a minimum assay of 99%. This product is not intended for pharmaceutical, food, or any other regulated application unless explicitly stated otherwise. TSS does not represent this chemical as USP, BP, or EP grade.

What are the safety and handling considerations for (R,R)-(−)-2,4-Pentanediol?

This compound has a flash point of 101 °C (213.8 °F) and a WGK rating of 3 in Germany, indicating it is combustible and potentially hazardous. Appropriate personal protective equipment, including eyeshields, gloves, and a P1 or N95 respirator filter, should be used during handling.

How is (R,R)-(−)-2,4-Pentanediol packed, shipped, and exported?

Tech Serve Solutions specialises in the global supply and export of fine chemicals, ensuring appropriate packaging and documentation for safe and compliant international shipment.

How can I request a sample or quote for (R,R)-(−)-2,4-Pentanediol?

To request a sample or a quotation, please contact the Tech Serve Solutions sales team via our website or by phone, referencing the product name and CAS number 42075-32-1.