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142-29-0 Cyclopentene competitive price hly 57

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Unit Price:

$1/MT FOB

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CAS No.:

142-29-0

Grade:

industrial Grade

Content:

99%

Port:

qingdao

Brand:

hly

Packaging:

200L (25kg / 150kg) closed-head steel drum

Price valid (until):

2027-02-28

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Suqian City Hengliyuan Import and Export Trade Co., LTD

Company Type:

Trader

Location:

China

Qualification:

Main Products:

Acrylonitrile,Sodium biselenite methylamine solution,Methylamine [anhydrous],Zinc dust,Hydrogen peroxide solution [content >8%],Triisopropyl borate

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Product Description
Seller Information
Inquiry History

Description

Company Profile ----------
Suqian City Hengliyuan Import and Export Trade Co., LTD is a trading company. The company has introduced advanced scientific and technological achievements from home and abroad, and has superior products from well-known manufacturers at home and abroad. The basic functions are:
1. Domestic trade of various chemical raw materials;
2. Providing price information services and chemical raw material procurement for industrial enterprises;
3. Cooperating with Chinese state-owned enterprise factories, the price and quality are very advantageous.
At present, the company is relying on the combination of industry and trade and global procurement to steadily improve the company's value-added ability and compound competitiveness. We have always been committed to producing high-quality and low-cost goods, so we have been sincerely recognized by many customers. Our goal is to produce the best products and satisfy every customer with professional services and attitudes. We look forward to cooperating with you and establishing a win-win relationship with you. Please rest assured that we will definitely satisfy you.

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----------packaging and delivery ----------

----------Our Advantages---------
High quality with competitive price
1) Standard:BP/USP/EP/Enterprise standard
2) All Purity≥99%
3) We can provide high quality products with factory price
2. Fast delivery
1) Fast shipment.Various transportation methods for your choice.
2) We have our own agent/remailer/distributor who can help us ship our products very fast , and we have stock in the ir for transferring.
3. Good communication and credit
1) Fast response to customer within 5 hours
2) Good business credit in Europe, US, Japan, Korea, Af r ica and so on.

Items	Specifications

Cyclopentanone

CAS No.: 142-29-0

1. Basic Identification

IUPAC Name: Cyclopentanone

Chinese Name:

Synonyms: Ketocyclopentane, Cyclopentyl ketone

EINECS No.: 205-534-3

MDL No.: MFCD00001360

Molecular Formula: $\boldsymbol{C_5H_8O}$

Molecular Weight: 84.12

SMILES: O=C1CCCC1

UN Number: UN 2245

HS Code: 2914220090

Hazard Classification: Class 3 Flammable Liquid Cat.3, Packing Group III

Chemical Category: Alicyclic ketone fine chemical, pharmaceutical intermediate, perfume raw material, pesticide synthesis building block, solvent for electronic materials

2. Physical & Chemical Properties

Appearance

Colorless transparent low-viscosity liquid, mild mint-like ketone odor, volatile at room temperature.

Physical Constant Table

Parameter	Standard Value	Remarks
Melting Point	-51.3 ℃	Liquid under normal storage
Boiling Point	130–131 ℃ (760 mmHg)	Stable distillation without decomposition
Density (20 ℃)	0.948–0.949 g/mL	Lighter than water, floats on water
Refractive Index $n_{20/D}$	1.436–1.437	Purity detection index
Closed Cup Flash Point	26 ℃	Flammable liquid, low ignition point
Autoignition Temperature	438 ℃
Explosion Limit in Air (V/V)	1.5% ~ 10.3%	Flammable vapor accumulates in low terrain
Water Miscibility	Slightly soluble in water
Organic Miscibility	Fully miscible with ethanol, acetone, toluene, xylene, ethyl acetate, mineral oil

Core Chemical Characteristics

Active alicyclic ketone carbonyl

Undergoes aldol condensation, imine formation, reduction, oxidation and nucleophilic addition; core skeleton for five-membered ring heterocyclic synthesis.
Self-condensation characteristic

Under acid/alkali catalysis, two molecules condense to form cyclopentylidene cyclopentanone, key intermediate for spices and APIs.
Reduction property

Catalytic hydrogenation generates cyclopentanol; oxidation produces glutaric acid.
Incompatible hazardous materials: Strong oxidants, concentrated strong acids, strong alkalis, open flames, static sparks

3. Export Industrial Quality Specifications

Premium Synthetic Grade ≥99.0% (Mainstream Export)

Test Item	Standard Spec	Test Method
Cyclopentanone Main Content	≥99.0 wt%	GC-FID Gas Chromatography
Cyclopentanol Impurity	≤0.10 %	GC
Moisture Content	≤0.10 %	Karl Fischer Titration
Color (APHA)	≤15	Platinum-Cobalt Colorimetry
Distillate 129–132 ℃ Fraction	≥95 vol%	Atmospheric distillation test
Appearance	Colorless clear liquid without turbidity or suspended particles	Visual Inspection

Pharma Ultra-Pure Grade ≥99.5%

Ultra-low alcohol and water impurities, dedicated for high-purity five-membered ring drug intermediate synthesis.

4. Main Industrial Applications

4.1 Pharmaceutical Fine Chemical Industry (High-value consumption)

Core building block for anti-cancer, anti-inflammatory, antibacterial APIs; aldol condensation constructs cyclopentane fused heterocyclic drug skeletons.
Synthetic precursor for prostaglandin series drugs, hormone intermediates.

4.2 Perfume & Fragrance Industry

Raw material for jasmone, dihydrojasmone, civetone musk series high-grade perfumes; self-condensation product has natural animal musk aroma.
Flavor modifier for cosmetic essence and tobacco flavor formulation.

4.3 Pesticide Industry

Intermediate for high-efficiency selective herbicides and fungicides; five-membered ring structure improves biological activity and crop safety.
Synthesis raw material for plant growth regulators.

4.4 Other Industrial Fields

High-solubility solvent for electronic resin, photoresist stripping agent, circuit board ink diluent.
Analytical chromatographic solvent, extraction solvent for natural plant active ingredients.
Catalyst auxiliary for polyimide resin polymerization.

5. Toxicology, Health Hazards & First Aid

Toxicity Profile

Acute Oral LD50 (Rat): 1050–1300 mg/kg (Category 4 harmful if swallowed)
Dermal hazard: Mild degreasing irritant; long-time continuous contact causes skin dryness and erythema, no corrosiveness.
Inhalation hazard: Volatile vapor irritates nose and throat, high concentration induces dizziness, nausea and lethargy.
Eye hazard: Liquid splashing causes transient stinging and conjunctival swelling.
Environmental hazard: Moderately toxic to aquatic organisms, biodegradable.

Exposure Symptoms

Inhalation of vapor: Dizziness, headache, dry throat, nausea
Skin contact: Mild dry, itchy rash after long-term contact
Eye splash: Temporary burning, eye redness
Oral ingestion: Mild abdominal distension, vomiting tendency

Complete First-Aid Procedures

Inhalation: Move victim to ventilated fresh air, rest and inhale oxygen if dyspnea; hospital observation for severe discomfort.
Skin Contact: Remove contaminated clothes, wash skin repeatedly with soap and large-volume cold running water for 10–15 minutes.
Eye Contact: Force open eyelids, continuously flush eyes with abundant cold clean water ≥10 minutes, ophthalmic examination if pain persists.
Oral Intake: Drink plenty of warm water or milk for dilution; do not induce vomiting, seek medical treatment for persistent nausea.

6. Storage, Handling & Incompatibility Rules

Mandatory Storage Conditions

Warehouse classification: Class 3 flammable liquid warehouse, fully isolated from oxidants, ignition sources, food raw materials.
Temperature control: Ambient storage ≤25 ℃, cool dark warehouse, avoid direct sunlight heating to reduce volatilization.
Sealing requirement: 200L plastic-lined carbon steel drum fully sealed with PTFE gaskets; warehouse equipped with flammable vapor leakage alarm, explosion-proof electrical equipment.
Static control: All transfer pipelines fully grounded; only non-sparking copper tools allowed for loading and sampling.
Shelf life: 12 months under intact airtight packaging.

Strictly Separated Incompatible Materials

Hydrogen peroxide, potassium permanganate, concentrated sulfuric acid, caustic soda, open flames, welding equipment.

Safe Operation Specifications

Operators wear nitrile solvent-resistant gloves, impact safety goggles, anti-static overalls; organic vapor respirator required for large-volume transfer operations.
All feeding, transfer and sampling operations under negative pressure explosion-proof fume hood; smoking, mobile phone use and spark-generating tools completely prohibited within 15m radius.
Small leakage: Absorb liquid with dry inert sand, isolate all heat sources, collect waste into sealed flammable hazardous waste plastic barrels.
Large leakage: Build sand retaining dikes to contain liquid, block rainwater and sewage pipelines to prevent flammable vapor diffusion.

7. Export Packaging & Global Transportation Regulations

Standard Export Packaging Modes

Industrial synthetic grade: 200L plastic-lined carbon steel drum
Medium batch: 25L thick-wall plastic-lined iron drum
Lab reagent small package: 1L / 5L brown glass bottle with shockproof carton outer packaging

UN Transport Compliance Rules

UN 2245, Class 3 Flammable Liquid, Packing Group III

Road transport: Flammable liquid dedicated hazardous goods vehicles, explosion-proof electrical parts, leakage collection trays, dual dry powder & CO₂ fire extinguishers.
Ocean shipment: IMDG Class 3 flammable liquid hazard label, stacking height ≤2 layers, segregated from oxidizer and edible cargo holds.
Loading ban: Mixed loading with strong oxidants, edible goods, feed is completely forbidden.

Full Export Document Package

Batch Certificate of Analysis (COA)
GHS-compliant MSDS / SDS
Technical Data Sheet (TDS)
Marine Dangerous Goods Declaration
REACH Registration Compliance Report

8. GHS Global Hazard Label Statements

Signal Word: Warning

Hazard Statements:

H226 Flammable liquid and vapor

H315 Causes skin irritation

H319 Causes serious eye irritation

H335 May cause respiratory irritation

Precautionary Statements:

P210 Keep away from heat, sparks, open flames — No smoking

P261 Avoid breathing ketone vapor/mist

P280 Wear solvent-resistant gloves and eye protection

P305+P351+P338 IF IN EYES: Rinse continuously with water for several minutes

P403+P235 Store in cool, dark, ventilated flammable liquid warehouse, tightly sealed

P501 Dispose of waste liquid as flammable organic hazardous waste per local environmental laws

9. Fire Emergency Disposal Plan

Approved Fire Extinguishing Agents

Primary: Carbon dioxide (CO₂), dry chemical powder
Auxiliary: Alcohol-resistant foam

Forbidden Agents

High-pressure water jet (liquid floats on water surface and spreads flammable vapor over wide area)

Fire Site Operation Steps

Evacuate all personnel to upwind safe zone ≥200m, isolate fire area and block pedestrian access.
Cool surrounding sealed storage drums with water mist only on outer walls, prevent vapor expansion rupture.
Collect all oily residual waste after fire; deliver to professional organic hazardous waste incineration plant, prohibit rainwater flushing waste into soil, rivers or sewers.

10. Printable Export COA Template

CERTIFICATE OF ANALYSIS

Product Name: Cyclopentanone

CAS No.: 142-29-0

Grade: Export Pharmaceutical & Perfume Synthetic Industrial Grade

Batch No.: ____________

Net Weight: 200kg/drum

Manufacture Date: ____________

Test Item	Standard Spec	Test Result	Test Method
Cyclopentanone Purity	≥99.0 %		GC Gas Chromatography
Cyclopentanol Impurity	≤0.10 %		GC
Moisture Content	≤0.10 %		Karl Fischer Titration
Color (APHA)	≤15		Platinum-Cobalt Colorimetry
Distillation Range 129–132℃ Fraction	≥95 vol%		Atmospheric Distillation
Appearance	Colorless clear liquid without turbidity or sediment	Visual Inspection

Conclusion: This batch complies with export industrial standard of Cyclopentanone.

Inspector Signature: ____________

Issuance Date: ____________

11. E-commerce Listing Copy (Alibaba / Echemi Direct Use)

Product Title

Cyclopentanone CAS 142-29-0 99% Colorless Flammable Alicyclic Ketone Liquid Pharmaceutical Intermediate Musk Perfume Raw Material Electronic Photoresist Solvent Herbicide Precursor

Short Description

Cyclopentanone (C₅H₈O, CAS 142-29-0) high-purity flammable alicyclic ketone liquid. Core five-membered ring synthesis raw material for prostaglandin and anti-inflammatory pharmaceutical APIs; condensation precursor for jasmone/musk high-grade perfumes; also used as photoresist stripping solvent and pesticide intermediate. Complete UN2245 Class3 flammable liquid dangerous goods export documents COA, MSDS and TDS for bulk drum sea shipment.

Full Description

Cyclopentanone is a small-molecule alicyclic ketone fine chemical, supplied as colorless transparent volatile liquid with ≥99% GC purity. Its active carbonyl group supports aldol condensation and multi-step derivatization, becoming irreplaceable core raw material in pharmaceutical, high-end spice and electronic chemical industries. It has low flash point, flammable vapor easily accumulates in low-lying areas, requiring full explosion-proof ventilation and sealed shading storage.

Core downstream application sectors: synthetic building block for prostaglandin, anti-tumor and antibacterial pharmaceutical intermediates; raw material for dihydrojasmone, civetone animal musk series premium fragrances; solvent for electronic circuit photoresist stripping and ink dilution; starting material for selective herbicide and fungicide production. We supply standard industrial general grade and ultra-low-impurity pharmaceutical special grade.

Packed in 200L plastic-lined sealed steel drums for full-container sea freight. Classified UN2245 Class 3 flammable hazardous substance, we provide complete IMDG flammable liquid transport, commodity inspection and REACH compliance certificates for long-term bulk supply to pharmaceutical fine chemical factories, flavor manufacturers and electronic material enterprises.

Shop 142-29-0 Cyclopentene competitive price hly 57-Detailed Image 4

ECHEMI Editorial Reference

Cyclopentene is a cycloolefin, i.e. cyclopentane with a double bond in the ring, and is an organic compound. Its chemical formula is C5H8, and its molecular weight is 68.12. It is a colorless liquid with a special sweet and petroleum smell. It is insoluble in water, but soluble in most organic solvents such as ethanol, ether, and benzene. It is mainly used as a comonomer, solvent, and can also be used in organic synthesis. Its vapor is heavier than air, and inhaling high concentrations may produce anesthetic effects. Cyclopentene is highly flammable, and its vapor can form an explosive mixture with air. When exposed to open flames, high heat, or contact with oxidants, cyclopentene is at risk of causing combustion and explosion. Because its vapor is heavier than air, it can spread to a considerable distance at a lower level, and it will catch fire and burn back when it encounters a fire source.

Certificates

Basic Info

Product Name:

Cyclopentene

Other Name:

Cyclopentene;NSC 5160;1-Cyclopentene;33004-05-6

CAS No.:

142-29-0

Molecular Formula:

C5H8

InChIKeys:

InChIKey=LPIQUOYDBNQMRZ-UHFFFAOYSA-N

Molecular Weight:

68.12

Exact Mass:

68.12

BRN:

635707

EC Number:

205-532-9

UNII:

ONM2CKV81Z

NSC Number:

5160

UN Number:

2246

DSSTox ID:

DTXSID6029171

HScode:

29021990

Categories:

Bulk Drug Intermediates

Characteristics

PSA:

XLogP3:

2.33

Appearance:

Colorless Liquid

Density:

0.7754 g/cm³ @ Temp: 14 °C

Melting Point:

-135.1 °C

Boiling Point:

44.2 °C

Flash Point:

<−30 °F

Refractive Index:

n 20/D 1.421(lit.)

Water Solubility:

H2O: immiscible

Storage Conditions:

0-6°C

Vapor Pressure:

20.89 psi ( 55 °C)

Toxicity:

Oral-Rat LD50: 1656 mg/kg

Flammability characteristics:

Inflammable in case of open flame, high temperature, oxidant; burning produces irritating smoke

OH:

6.70e-11 cm3/molecule*sec

Air and Water Reactions:

Highly flammable. Insoluble in water.

Reactive Group:

Hydrocarbons, Aliphatic Unsaturated

Reactivity Alerts:

Highly Flammable

Reactivity Profile:

CYCLOPENTENE may react vigorously with strong oxidizing agents. May react exothermically with reducing agents to release hydrogen gas. In the presence of various catalysts (such as acids) or initiators, may undergo exothermic addition polymerization reactions.

Peroxide Forming Chemical:

Cyclopentene|B: Compounds that form peroxides on concentration (distillation/evaporation)|Clark

See More Cyclopentene Properties 

Hazard Identification

Classification of the substance or mixture

Flammable liquids, Category 2

Acute toxicity - Category 4, Oral

Aspiration hazard, Category 1

Acute toxicity - Category 4, Dermal

Skin irritation, Category 2

GHS label elements, including precautionary statements

Precautionary statement(s)
Pictogram(s)
Signal word	Danger
Hazard statement(s)	H225 Highly flammable liquid and vapour H302 Harmful if swallowed H304 May be fatal if swallowed and enters airways H312 Harmful in contact with skin H315 Causes skin irritation
Prevention	P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking. P233 Keep container tightly closed. P240 Ground and bond container and receiving equipment. P241 Use explosion-proof [electrical/ventilating/lighting/...] equipment. P242 Use non-sparking tools. P243 Take action to prevent static discharges. P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/... P264 Wash ... thoroughly after handling. P270 Do not eat, drink or smoke when using this product.
Response	P303+P361+P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse affected areas with water [or shower]. P370+P378 In case of fire: Use ... to extinguish. P301+P317 IF SWALLOWED: Get medical help. P330 Rinse mouth. P301+P316 IF SWALLOWED: Get emergency medical help immediately. P331 Do NOT induce vomiting. P302+P352 IF ON SKIN: Wash with plenty of water/... P317 Get medical help. P321 Specific treatment (see ... on this label). P362+P364 Take off contaminated clothing and wash it before reuse. P332+P317 If skin irritation occurs: Get medical help.
Storage	P403+P235 Store in a well-ventilated place. Keep cool. P405 Store locked up.
Disposal	P501 Dispose of contents/container to an appropriate treatment and disposal facility in accordance with applicable laws and regulations, and product characteristics at time of disposal.

Other hazards which do not result in classification

no data available

Handling and Storage

Precautions for safe handling

Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.

Conditions for safe storage, including any incompatibilities

Store the container tightly closed in a dry, cool and well-ventilated place. Store apart from foodstuff containers or incompatible materials.

See More Cyclopentene Safety Data Sheet 

Seller Information

Business Type:
Trader

Main Products:
Acrylonitrile,Sodium biselenite methylamine solution,Methylamine [anhydrous],Zinc dust,Hydrogen peroxide solution [content >8%],Triisopropyl borate

Location:
Shop No.15, 1st Floor, Building 12, Hengda Huafu, Sucheng District, Suqian City

Payment Terms:
TT against B/L draft before shipment,100% TT in advance

Average lead Time:
30

Total Annual Revenue:
Less than $1 million

Total Employees:
5-10

Year of Establishment:
2022
Company Overview

Suqian Hengliyuan Import and Export Corporation, Ltd. is a leading enterprise specializing in the international trade of chemical products. Established in Suqian, Jiangsu Province, China, our company has built a strong reputation for excellence and reliability in the chemical industry.

Our Mission

Our mission is to facilitate global trade by providing high-quality chemical products and exceptional service to our clients. We aim to be a bridge between manufacturers and end-users, ensuring the safe and efficient transfer of chemicals across borders.

Products and Services

We offer a comprehensive range of chemical products, including but not limited to:

Industrial Chemicals: Raw materials for various industries such as pharmaceuticals, agriculture, and manufacturing.

Specialty Chemicals: High-performance chemicals used in specific applications, including water treatment, coatings, and adhesives.

Bulk Chemicals: Large-volume chemicals for industrial processes and manufacturing needs.

Quality Assurance

At Suqian Hengliyuan Import and Export Corporation, Ltd., quality is our top priority. We adhere to stringent quality control measures and international standards to ensure that our products meet the highest levels of purity and performance. Our dedicated quality assurance team conducts rigorous inspections and testing to guarantee the integrity and safety of all our chemical products.

Global Network

Leveraging our extensive network of suppliers and partners, we are able to source and deliver a wide array of chemical products to clients worldwide. Our strategic partnerships and logistical expertise enable us to offer competitive pricing, timely delivery, and customized solutions to meet the diverse needs of our clients.

Commitment to Sustainability

We are committed to sustainable business practices and environmental stewardship. Our operations are designed to minimize environmental impact, and we continuously seek ways to improve our processes and reduce our carbon footprint. We work closely with our suppliers and customers to promote the responsible use and disposal of chemicals.

Customer Focus

Our clients are at the heart of everything we do. We pride ourselves on providing personalized service and building long-term relationships based on trust and mutual benefit. Our experienced team of professionals is dedicated to understanding our clients' needs and delivering solutions that exceed their expectations.

Inquiry History

1 Inquiries

Country	Product	Purchase Quantity	Date Posted
India	Cyclopentene	1 20' Fcl	May 28, 2025

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