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Valeryl chloride cas no 638-29-9

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CAS No.:

638-29-9

Grade:

Industrial Grade

Content:

99%

Port:

qingdao

Brand:

hly

Packaging:

200kg UN-certified closed steel drums

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.

----------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.

Complete Product Details – Valeryl Chloride (Pentanoyl Chloride) CAS 638-29-9

1. Basic Identification Data

CAS No.: 638-29-9

Chemical Name: Valeryl Chloride / Valeroyl Chloride

IUPAC Name: Pentanoyl Chloride

Synonyms: N-Valeryl Chloride, Pentanoic Acid Chloride, Vacl

EINECS No.: 211-330-1

Molecular Formula: C₅H₉ClO

Molecular Weight: 120.58

SMILES: CCCCC(=O)Cl

MDL No.: MFCD00000757

UN Transport No.: UN 2920

HS Code: 2915900090

Dangerous Goods Classification: Class 3 Flammable Liquid + Class 8 Corrosive Substance, Packing Group II

Chemical Category: Aliphatic acyl chloride, high-activity acylation reagent

2. Physical & Chemical Properties

2.1 Appearance

Colorless to pale yellow transparent fuming liquid with strong pungent acid odor; generates white corrosive mist when exposed to humid air.

2.2 Core Physical Constants

Parameter	Standard Value
Melting Point	-110 ℃
Boiling Point	125–127 ℃ (760 mmHg)
Density (25 ℃)	1.016 g/mL
Refractive Index n₂₀/D	1.420
Closed Cup Flash Point	32.8 ℃ (91 ℉)
Vapor Pressure (20 ℃)	12 mmHg, volatile
Solubility	Reacts violently with water, alcohol, amine; miscible with chloroform, toluene, xylene, dichloromethane, anhydrous ethers; insoluble in alkane

2.3 Key Chemical Characteristics

Severe hydrolysis reaction with moisture/water: Rapidly decomposes into valeric acid and highly corrosive hydrogen chloride gas, releases massive heat.

$C_4H_9COCl + H_2O = C_4H_9COOH + HCl↑$

2. Powerful acylation reagent: Reacts with alcohols to form valerate esters, reacts with amines/anilines to generate amide intermediates for pharma & agrochemicals.

3. Strong corrosivity to metals, rubber, skin and eye mucosa; reacts exothermically with strong bases, oxidants and ammonia.

4. Flammable; vapor forms explosive mixture with air; incompatible with water, protic solvents, alkaline substances, reducing agents.

5. Stable under sealed anhydrous storage; discolors gradually if contaminated with water or long-term air exposure.

3. Industrial Export Quality Specifications (Premium Grade ≥98%)

Test Item	Standard Spec	Test Method
Valeryl Chloride Purity	≥98.0 %	Gas Chromatography GC
Free Valeric Acid Impurity	≤1.0 %	Acid-Base Titration
Moisture Content	≤0.10 %	Karl Fischer Titration
Chloride Ion Residue	≤0.05 %	Potentiometric Titration
Color (APHA/Hazen)	≤100	Platinum-Cobalt Colorimetry
Distillation Residue	≤0.03 %	Gravimetric Heating
Appearance	Colorless pale yellow clear fuming liquid without sediment	Visual Inspection

High-Purity Pharma Grade (≥99.5%)

Ultra-low free acid & heavy metals (Pb, As <1ppm), strictly anhydrous for fine API & peptide synthesis.

4. Main Industrial Applications

4.1 Pharmaceutical & Peptide Synthesis (High-Value Core Field)

Key acylation raw material for cardiovascular, anti-inflammatory and antibacterial APIs; introduces pentanoyl side chain via amide/ester formation.
Acylation coupling reagent for solid-phase peptide synthesis; modifies amino group of amino acid precursors to protect active sites.
Intermediate for lipid drugs, vitamin derivatives and steroid compound synthesis.

4.2 Agrochemical Intermediates

Manufacture of amide fungicides, herbicides and insecticides; acylates aromatic amine skeletons to enhance biological activity.
Raw material for plant growth regulator and pesticide emulsifier ester synthesis.

4.3 Fine Chemical & Fragrance Industry

Synthesis of fruit-flavor valerate esters (pentyl valerate, ethyl valerate) for food essence and daily perfume.
Condensation agent for azo dyes, fluorescent whitening agents and pigment intermediates.

4.4 Polymer & Coating Additives

Modification agent for polyamide, polyester resin; improves resin flexibility and adhesion.
Curing auxiliary and cross-linking reagent for polyurethane, alkyd anti-corrosion coatings.

4.5 Laboratory Universal Organic Synthesis Reagent

Standard aliphatic acylating agent for Friedel-Crafts acylation, esterification, amidation and heterocyclic cyclization reactions.

5. Safety, Packaging, Storage & Transportation Regulations

5.1 GHS Hazard Classification

Flammable Liquid Category 3
Skin Corrosion Category 1B, Serious Eye Damage Category 1
Acute Inhalation Toxicity Category 4

Signal Word: Danger

Main Hazard Statements:

H226 Flammable liquid and vapor

H314 Causes severe skin burns and eye damage

H332 Harmful if inhaled

H290 May be corrosive to metals

H260 Reacts violently with water releasing corrosive gas

5.2 Export Standard Packaging

Bulk industrial grade: 200L lined anti-corrosion steel drum, nitrogen-sealed inner seal to block moisture
Small trial packaging: 25L plastic-lined iron drum, 5L sealed metal can
Pharma high-purity grade: Moisture-proof nitrogen-filled metal barrel

5.3 Storage Control Requirements

Store in independent cool, dry, airtight hazardous chemical warehouse, temperature ≤25 ℃; strictly isolate rain, moisture and humid air.
Separate storage away from water, alcohols, amines, strong acids, strong alkalis, oxidants and food raw materials.
Warehouse equipped with negative pressure ventilation, HCl gas alarm, acid-resistant PPE and dry powder fire extinguisher (water forbidden for fire fighting).
Shelf life: 12 months under sealed anhydrous storage; re-test purity once expired.

5.4 Sea & Land Transport Rules

UN 2920, Dual hazard: Class 3 Flammable Liquid + Class 8 Corrosive Dangerous Goods, Packing Group II

Fully waterproof protection during transit; prohibit loading/unloading under rainy/humid weather.
Strictly forbidden to mix load with aqueous chemicals, alcohol, amine, oxidants and edible additives in one container.
Complete export clearance documents supplied: COA, MSDS, TDS, hazardous goods identification certificate, marine dangerous goods declaration.

6. E-commerce Listing Copy (Direct Copy for Echemi / Alibaba)

Product Title

Valeryl Chloride Pentanoyl Chloride CAS 638-29-9 98% High Purity Acyl Chloride Liquid for Pharmaceutical API Peptide Agrochemical Fragrance Intermediate

Short Description

Valeryl Chloride (C5H9ClO, CAS 638-29-9) ≥98% pale yellow fuming acyl chloride liquid, high-efficiency acylation reagent. Widely used as key intermediate for pharmaceutical APIs, solid-phase peptide synthesis, agrochemical amide pesticides and fruit flavor ester manufacturing. Full set of export hazardous documents including COA, MSDS and TDS available for global bulk shipment.

Full Listing Description

Valeryl Chloride (also named Pentanoyl Chloride) with CAS registry number 638-29-9 is a critical aliphatic acyl chloride supplied as colorless to light yellow transparent fuming liquid complying with industrial premium GC purity standard ≥98%. It features ultra-high acylation activity, widely adopted to produce amides, esters and heterocyclic fine chemicals.

This chemical covers multiple high-value downstream industries: pharmaceutical raw material & peptide synthesis for side-chain acylation; agrochemical fungicide & herbicide intermediate; food-grade fruit fragrance valerate ester raw material; dye & coating resin modifier and lab organic synthesis universal acylating reagent. We also supply 99.5% anhydrous pharma special grade with ultra-low heavy metal impurities for high-end fine synthesis.

Products are packed in nitrogen-sealed moisture-proof lined steel drums for full container shipment. Classified as UN2920 flammable & corrosive dangerous goods, we provide complete official customs clearance papers to support global sea and land delivery with stable continuous supply capacity.

7. Printable Export Certificate of Analysis Template

CERTIFICATE OF ANALYSIS

Product Name: Valeryl Chloride (Pentanoyl Chloride)

CAS No.: 638-29-9

Grade: Export Premium Industrial Grade

Batch No.

Net Weight: 200kg/drum

Manufacture Date:

Test Item	Standard Spec	Test Result	Test Method
Valeryl Chloride Assay Purity	≥98.0 %		GC Gas Chromatography
Free Valeric Acid	≤1.0 %		Acid-Base Titration
Moisture Content	≤0.10 %		Karl Fischer Titration
Chloride Ion Residue	≤0.05 %		Potentiometric Titration
Color (APHA)	≤100		Platinum-Cobalt Colorimetry
Distillation Residue	≤0.03 %		Gravimetric Heating Test
Appearance	Colorless pale yellow clear fuming liquid without sediment	Visual Inspection

Conclusion: This batch meets premium export standard of Valeryl Chloride.

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ECHEMI Editorial Reference

clear colorless to light yellow liquid
Valeryl chloride appears as a colorless fuming liquid with a pungent odor. Fumes irritate the eyes and mucous membranes. Corrosive.
Valeryl chloride appears as a colorless fuming liquid with a pungent odor. Fumes irritate the eyes and mucous membranes. Corrosive.

Certificates

Basic Info

Product Name:

Pentanoyl chloride

Other Name:

Pentanoyl chloride;Valeryl chloride;Valeroyl chloride;n-Pentanoyl chloride;Pentanoic acid chloride;n-Butanecarbonyl chloride;n-Valeryl chloride

CAS No.:

638-29-9

Molecular Formula:

C5H9ClO

InChIKeys:

InChIKey=XGISHOFUAFNYQF-UHFFFAOYSA-N

Molecular Weight:

120.58

Exact Mass:

120.58

BRN:

506293

EC Number:

211-330-1

UNII:

KJ3B4CY5GG

UN Number:

2502

DSSTox ID:

DTXSID2034091

HScode:

29159080

Categories:

Amides

Characteristics

PSA:

17.1

XLogP3:

2.05

Appearance:

Clear colorless to light yellow Liquid

Density:

1.0±0.1 g/cm3

Melting Point:

-110 °C

Boiling Point:

109 °C

Flash Point:

91 °F

Refractive Index:

1.417

Water Solubility:

Decomposes in water

Storage Conditions:

Flammables area

Flammability characteristics:

Flammable; emit toxic hydrogen chloride gas in water

Air and Water Reactions:

Highly flammable. Fumes in air. Reacts exothermically with water to generate hydrochloric and valeric acids, which are corrosive.

Reactive Group:

Acyl Halides, Sulfonyl Halides, and Chloroformates

Reactivity Alerts:

Highly Flammable

Reactivity Profile:

VALERYL CHLORIDE is acidic. Incompatible with water, with bases, including amines, and with strong oxidizing agents and alcohols. May react vigorously or explosively if mixed with diisopropyl ether or other ethers in the presence of trace amounts of metal salts [J. Haz. Mat., 1981, 4, 291].

See More Pentanoyl chloride Properties 

Hazard Identification

Classification of the substance or mixture

Flammable liquids, Category 3

Corrosive to metals, Category 1

Skin corrosion, Sub-category 1A

Serious eye damage, Category 1

Acute toxicity - Category 3, Inhalation

Hazardous to the aquatic environment, long-term (Chronic) - Category Chronic 3

GHS label elements, including precautionary statements

Precautionary statement(s)
Pictogram(s)
Signal word	Danger
Hazard statement(s)	H226 Flammable liquid and vapour H290 May be corrosive to metals H314 Causes severe skin burns and eye damage H331 Toxic if inhaled H412 Harmful to aquatic life with long lasting effects
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/... P234 Keep only in original packaging. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P264 Wash ... thoroughly after handling. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P271 Use only outdoors or in a well-ventilated area. P273 Avoid release to the environment.
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. P390 Absorb spillage to prevent material damage. P301+P330+P331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. P363 Wash contaminated clothing before reuse. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P316 Get emergency medical help immediately. P321 Specific treatment (see ... on this label). P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P305+P354+P338 IF IN EYES: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P317 Get medical help.
Storage	P403+P235 Store in a well-ventilated place. Keep cool. P406 Store in a corrosion resistant/...container with a resistant inner liner. P405 Store locked up. P403+P233 Store in a well-ventilated place. Keep container tightly closed.
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 Pentanoyl chloride 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

3 Inquiries

Country	Product	Purchase Quantity	Date Posted
India	n-Valeryl Chloride	1000 KG	May 3, 2026
United States	Valeroyl chloride	29.32 MT	May 28, 2024
India	Valeroyl chloride	29.35 TON	May 24, 2024

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