Cyclopentanone | CAS 120 92 3

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High purity Cyclopentanone for pharmaceutical synthesis, fragrance compounding, and specialty solvent applications.

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Specification

Purity by GC: 99.0 percent minimum, typical batch 99.2 to 99.5 percent
Appearance: Colorless clear liquid
Odor: Characteristic ethereal, minty, reminiscent of peppermint
Molecular formula: C5H8O
Molecular weight: 84.12 g per mol
Density at 20 deg C: 0.948 to 0.950 g per mL
Refractive index nD20: 1.436 to 1.438
Melting point: -51 deg C
Boiling point: 130 to 131 deg C
Flash point: 26 deg C (closed cup)
Water content Karl Fischer: 0.10 percent maximum
Color APHA: 20 maximum
Residue on evaporation: 0.02 percent maximum
Heavy metals: Less than 5 ppm
Stock Status: In Stock in US warehouse and China hub

Available Quantity and Lead Time

Regular supply: 1 kg to 30 metric tons per shipment
Lead time: 2 to 5 days for standard packaging; bulk orders require 7 to 10 days

Document Support

COA SDS HPLC chromatogram NMR spectrum Mass spectrum MS available upon request

Application

Cyclopentanone is a versatile cyclic ketone with broad utility across pharmaceutical, agrochemical, fragrance, and specialty chemical sectors. In pharmaceutical synthesis, it serves as a key intermediate for the production of various active pharmaceutical ingredients including certain steroid hormones, antipsychotic agents, and antiviral compounds. The cyclopentyl ring structure is a common motif in drug molecules, making cyclopentanone a valuable building block for medicinal chemistry. In the flavor and fragrance industry, cyclopentanone and its derivatives contribute minty, ethereal, and floral notes to perfumes, soaps, and personal care products. It is often used in jasmine, gardenia, and tuberose accords. As an industrial solvent, cyclopentanone offers excellent solvency for a wide range of resins, polymers, and coatings, with an evaporation rate between those of acetone and methyl ethyl ketone. It is employed in the formulation of high performance paints, lacquers, and adhesives. In agrochemical manufacturing, it is used as an intermediate for herbicides and insecticides. In electronic chemicals, cyclopentanone serves as a photoresist solvent in semiconductor manufacturing due to its low metal ion content and good compatibility with photoresist resins. It is also used as a solvent for cleaning printed circuit boards and optical components. Additionally, cyclopentanone finds application in the production of cyclopentane derivatives, pharmaceutical impurities for reference standards, and as a starting material for the synthesis of dyes and photographic chemicals.

Custom Synthesis Support

We offer custom synthesis for cyclopentanone derivatives including alkylated, halogenated, and deuterated analogs. Our specialized distillation capabilities support production from laboratory scale to commercial quantities. Share your technical datasheet for feasibility review.

Packaging and Shipping

Available in 1 L, 5 L, 20 L, 200 L steel drums or IBC totes. Custom packaging such as amber glass bottles with PTFE lined caps under nitrogen is supported. Fastest dispatch within 7 days after order confirmation. Cyclopentanone is a flammable liquid Class 3, UN 2245, PG II. Store in a cool, well ventilated area away from ignition sources, strong oxidizers, and strong reducing agents. Grounding required during transfer.

Why XinChem

XinChem provides cyclopentanone with strict control of purity, water content, and residue levels for US customers. Our ISO 9001 certified facility monitors every batch by GC and Karl Fischer analysis, ensuring consistent quality for pharmaceutical and electronic chemical applications. We maintain a buffer stock of 10 metric tons in US warehouses for emergency deliveries within 48 hours. Each order includes a full documentation package: COA, SDS, GC chromatograms, and NMR spectra accessible through our online portal. Our technical support team assists with handling precautions, stability under storage, and regulatory compliance including TSCA, EINECS, and EPA regulations. For contract customers, we offer quarterly price locks and consignment inventory to reduce supply chain risk. Trusted by over 200 pharmaceutical, fragrance, and electronic chemical companies in North America. We also provide free sample evaluation for qualified R&D projects and a price match guarantee against any valid competitor quote for equivalent quality. Additionally, we offer ultra high purity grade (99.5 percent) for sensitive electronic applications, as well as custom drying to achieve water content below 0.02 percent.

FAQ

Q1 How should cyclopentanone be stored safely?
A Store in a cool, dry, well ventilated area away from ignition sources, strong oxidizers, and strong reducing agents. Keep container tightly sealed. Shelf life is 24 months under recommended conditions.

Q2 What purity grades do you supply?
A Standard grade is 99.0 percent by GC. We also supply 99.5 percent grade for pharmaceutical and electronic applications, and ACS grade for analytical use.

Q3 Is cyclopentanone miscible with water?
A Moderately soluble in water (about 10 g per 100 mL at 20 deg C). Miscible with most organic solvents including alcohol, ether, ketones, and aromatic hydrocarbons.

Q4 Do you provide sample quantities for reaction optimization?
A Yes, free samples of 500 mL are available for qualified US companies. Shipping fee applies for small quantities.

Q5 What are the common impurities in cyclopentanone and how do you control them?
A Key impurities include 2-cyclopentenone, water, and high boiling residues. Our specification limits impurities below 0.3 percent and water below 0.1 percent. Full impurity profiling is provided per batch.

Q6 Can you supply cyclopentanone in ISO tank containers for bulk orders?
A Yes, we can supply in ISO tank containers (20 metric tons per tank) for bulk quantities. Please contact our logistics team for lead time and pricing.

Q7 What safety measures are required when handling cyclopentanone?
A Use in a fume hood with full PPE (chemical resistant gloves, safety goggles, lab coat). Cyclopentanone is flammable and may cause eye and skin irritation. Avoid inhalation and prolonged skin contact. Provide adequate explosion-proof ventilation.