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Quinoline cas no 91-22-5

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CAS No.:

91-22-5

Grade:

Industrial Grade

Content:

99%

Port:

qingdao

Brand:

hly

Packaging:

25kg plastic 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.

Complete English Product Details – Quinoline CAS 91-22-5

1. Basic Identification Information

CAS No.: 91-22-5

Chemical Name: Quinoline

Synonyms: Benzo[b]pyridine, 1-Azanaphthalene, Leucoline, Benzopyridine

EINECS No.: 202-051-6

MDL No.: MFCD00006736

Molecular Formula: C₉H₇N

Molecular Weight: 129.16

SMILES: n1ccc2ccccc2c1

UN Number: UN 2626

HS Code: 29334990

Hazard Classification: Class 6.1 Toxic Substance, Packing Group III

Chemical Category: Heterocyclic aromatic nitrogen compound, core fine chemical & pharmaceutical intermediate

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Quinoline Molecular Structure

2. Physical & Chemical Properties

Appearance

Colorless transparent hygroscopic oily liquid with characteristic strong pungent heterocyclic odor; gradually turns pale yellow then dark brown under light & air oxidation.

Core Physical Constants

Parameter	Standard Value
Melting Point	-14.5 ~ -17 ℃
Boiling Point	237.7 ℃ (760 mmHg)
Density (20 ℃)	1.092–1.094 g/mL
Refractive Index n₂₀/D	1.626–1.628
Closed Cup Flash Point	107 ℃
Autoignition Temperature	480 ℃
Explosion Limit in Air	1.2% ~ 7.3 vol%
Vapor Pressure (25 ℃)	11 Pa, low volatility
Water Solubility	Slightly soluble (6 g/L at 20 ℃)
Organic Solvent Solubility	Fully miscible with ethanol, methanol, acetone, ether, toluene, chloroform, DMF
pH (5 g/L aqueous solution)	7.3, weak alkaline

Key Chemical Characteristics

Contains fused benzene-pyridine ring, nitrogen atom provides weak alkalinity; forms stable quinolinium salts with inorganic/organic acids.
Highly reactive aromatic heterocycle, easy to undergo nitration, sulfonation, halogenation, oxidation and substitution reactions on benzene & pyridine rings.
Light-sensitive & easily oxidized; long-term exposure generates colored quinone impurities, requiring light-proof sealed storage.
Excellent chelating capacity with heavy metal ions (Fe, Al, Cu); precursor to 8-hydroxyquinoline metal chelating agents.
Mild toxicity; absorbed via skin, inhalation and oral route, irritates eyes, skin and respiratory tract severely.
Compatible with most neutral/organic solvents; incompatible with strong oxidants, strong mineral acids and chlorine.

3. Export Industrial Quality Specifications (Premium Grade ≥98.0%)

Test Item	Standard Spec	Test Method
Quinoline Main Purity	≥98.0 %	GC Gas Chromatography
Isoquinoline Impurity	≤1.0 %	GC
Moisture Content	≤0.20 %	Karl Fischer Titration
Distillation Range (236–239 ℃)	≥95 vol%	Distillation Test
Color (APHA/Hazen)	≤150	Platinum-Cobalt Colorimetry
Heavy Metals (Pb, As)	≤10 ppm	Atomic Absorption Spectroscopy
Appearance	Colorless to light yellow clear liquid without sediment	Visual Inspection

High Purity Pharma Grade (GC ≥99.5%)

Ultra-low isoquinoline & heavy metal impurities (<1 ppm), strictly anhydrous, customized for high-end antibiotic and heterocyclic API synthesis.

4. Main Industrial Applications

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

Starting material for quinoline-series APIs: anti-malaria drugs, antibacterial fluoroquinolones, cardiovascular agents, anti-tumor heterocyclic medicines.
Precursor of 8-hydroxyquinoline: metal chelator for pharmaceutical purification, bacteriostatic raw material for topical ointments.
Condensation & cyclization reagent for nitrogen-containing heterocyclic drug skeletons and solid-phase peptide side-chain modification.
Raw material for nicotinic acid (vitamin B3) manufacturing.

4.2 Agrochemical Intermediates

Manufacture of quinoline fungicides, bactericides and plant growth regulators; inhibits fungal spore germination for fruit & crop protection.
Synthesis of pesticide chelating agents to improve trace element absorption in crops.

4.3 Dye & Photosensitive Material Industry

Raw material for cyanine dyes, azo dyes and photosensitive pigments used in photographic film, printing plate and color coupler production.
Fluorescent whitening agent intermediate for textile & paper finishing.

4.4 Analytical Chemistry & Laboratory Reagent

Universal metal ion extractant & chelating agent for separation of vanadate, arsenate, aluminum and iron ions in water & mineral testing.
High-boiling polar solvent for organic synthesis, alkaline condensation catalyst for multi-step coupling reactions.

4.5 Rubber & Fine Chemical Additives

Vulcanization accelerator and antioxidant for natural & synthetic rubber, enhances aging resistance of rubber products.
Corrosion inhibitor for metal surface treatment, preservative for industrial circulating water systems.

5. Safety, Packaging, Storage & Transportation Regulations

GHS Hazard Classification

Acute Oral/Dermal Toxicity Category 3
Skin Irritation Category 2, Serious Eye Damage Category 1
Specific Target Organ Toxicity Single Exposure Category 3

Signal Word: Danger

Main Hazard Statements:

H301 Toxic if swallowed

H311 Toxic in contact with skin

H319 Causes serious eye damage

H315 Causes skin irritation

H335 May cause respiratory irritation

Export Standard Packaging

Industrial bulk grade: 200L light-proof lined anti-corrosion steel drum, sealed nitrogen filling to block light & air
Small trial packaging: 25L plastic-lined iron drum, 5L sealed metal can
Pharma high-purity grade: Vacuum aluminum foil inner bag + iron drum moisture/light isolation packaging

Storage Requirements

Store in independent cool, dark, well-ventilated toxic chemical warehouse, ambient temperature ≤25 ℃, strictly avoid direct sunlight.
Seal all containers tightly to prevent oxidation discoloration and volatile vapor leakage; separate storage away from strong oxidants, strong acids, food raw materials.
Warehouse equipped with negative pressure ventilation, toxic gas alarm, chemical-resistant gloves, goggles and emergency eyewash station.
Shelf life: 12 months under sealed light-proof storage; re-test purity if stored beyond expiry date.

Sea & Land Transportation Regulation

UN 2626, Class 6.1 Toxic Dangerous Goods, Packing Group III

Full light-proof & waterproof protection during transit; prohibit long-time sun exposure and high-temperature stacking.
Strictly forbidden mixed loading with oxidants, strong acid chemicals 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

Quinoline Benzo[b]pyridine CAS 91-22-5 98% Light Yellow Liquid Heterocyclic Intermediate for Anti-Malaria API Agrochemical Fungicide Metal Chelator Dye

Short Description

Quinoline (C₉H₇N, CAS 91-22-5) ≥98% light yellow heterocyclic aromatic liquid with strong chelating & cyclization reactivity. Widely used as core raw material for quinoline-series pharmaceutical APIs, agricultural fungicides, photosensitive cyanine dyes and laboratory metal ion extraction reagent. Full set of export hazardous documents including COA, MSDS and TDS available for global bulk shipment.

Full Listing Description

Quinoline (also named Benzo[b]pyridine / 1-Azanaphthalene) with CAS registry number 91-22-5 is an essential fused nitrogen heterocyclic fine chemical supplied as colorless to pale yellow oily liquid complying with industrial GC purity standard ≥98%. Its unique benzene-pyridine fused ring structure enables versatile substitution, chelation and condensation reactions, irreplaceable in pharmaceutical and agrochemical manufacturing.

Major downstream application sectors include anti-malaria & fluoroquinolone antibiotic intermediate production; 8-hydroxyquinoline chelator raw material for medicine and water treatment; crop quinoline fungicide manufacturing; cyanine photosensitive dye & textile fluorescent whitening agent synthesis; lab analytical extraction solvent and rubber vulcanization auxiliary. We also supply ultra-high purity 99.5% pharmaceutical special grade with ultra-low isoquinoline and heavy metal impurities for high-end fine synthesis.

Products are packed in light-proof nitrogen-sealed lined steel drums for full container orders. Classified as UN2626 Class 6.1 toxic dangerous goods, we provide complete official customs clearance papers to support global sea and land delivery with stable continuous mass supply capacity.

7. Printable Export Certificate of Analysis Template

CERTIFICATE OF ANALYSIS

Product Name: Quinoline Liquid

CAS No.: 91-22-5
Grade: Export Premium Industrial Grade

Net Weight: 200kg/drum

Manufacture Date

Test Item	Standard Spec	Test Result	Test Method
Quinoline Assay Purity	≥98.0 %		GC Gas Chromatography
Isoquinoline Impurity	≤1.0 %		GC
Moisture Content	≤0.20 %		Karl Fischer Titration
Distillation Range (236–239℃)	≥95 vol%		Distillation Test
Color (APHA)	≤150		Platinum-Cobalt Colorimetry
Appearance	Colorless to light yellow clear liquid without sediment	Visual Inspection

Conclusion: This batch meets premium export industrial standard of Quinoline.

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ECHEMI Editorial Reference

colourless to brown liquid Quinoline is a colorless liquid with a penetrating amine odor. Turns brown on exposure to light. Quinoline has a heavy, penetrating and nauseating, yet sweet odor of good tenacity.
Quinoline appears as a colorless liquid with a peculiar odor. Slightly denser than water. Contact may irritate to skin, eyes, and mucous membranes. May be toxic by ingestion. Used to make other chemicals.|Liquid|COLOURLESS HYGROSCOPIC LIQUID WITH CHARACTERISTIC ODOUR. TURNS BROWN ON EXPOSURE TO LIGHT.
Quinoline appears as a colorless liquid with a peculiar odor. Slightly denser than water. Contact may irritate to skin, eyes, and mucous membranes. May be toxic by ingestion. Used to make other chemicals.|Quinoline is the simplest member of the quinoline class of compounds, comprising a benzene ring ortho fused to C-2 and C-3 of a pyridine ring. It is a mancude organic heterobicyclic parent, a member of quinolines, an azaarene and an ortho-fused heteroarene.|Quinoline is used mainly as an intermediate in the manufacture of other products. Potential exposure to quinoline may occur from the inhalation of cigarette smoke. Quinoline breaks down quickly in the atmosphere and water. Acute (short-term) inhalation exposure to quinoline vapors irritates the eyes, nose, and throat and may cause headaches, dizziness, and nausea in humans. Information on the chronic (long- term), reproductive, developmental, or carcinogenic effects of quinoline in humans is not available. Liver damage has been observed in rats chronically exposed to quinoline by ingestion. An increased incidence of liver vascular tumors has been observed in rats and mice orally exposed to quinoline. EPA has provisionally classified quinoline as a Group C, possible human carcinogen

Certificates

Basic Info

Product Name:

Quinoline

Other Name:

Quinoline;1-Azanaphthalene;1-Benzazine;Benzo[b]pyridine;Leucol;Leukol;Benzopyridine;Quinolin;B 500;Leucoline;NSC 3396;20214-07-7

CAS No.:

91-22-5

Molecular Formula:

C9H7N

InChIKeys:

InChIKey=SMWDFEZZVXVKRB-UHFFFAOYSA-N

Molecular Weight:

129.16

Exact Mass:

129.16

BRN:

107477

EC Number:

202-051-6

UNII:

E66400VT9R

ICSC Number:

0071

NSC Number:

3396

UN Number:

2656

DSSTox ID:

DTXSID1021798

Color/Form:

COLORLESS TO BROWN /SRP: TECHNICAL GRADE/|Highly refractive/darkens with age|Colorless liquid

HScode:

2933499090

Categories:

Biopesticides

Characteristics

PSA:

12.9

XLogP3:

2.06

Appearance:

Purple to dark grey Liquid

Density:

1.0900 g/cm³ @ Temp: 25 °C

Melting Point:

-14.78 °C

Boiling Point:

237.7 °C @ Press: 760 Torr

Flash Point:

214 °F

Refractive Index:

n20/D 1.625(lit.)

Water Solubility:

H2O: slightly soluble

Storage Conditions:

Store below +30°C.

Vapor Pressure:

Vapour pressure, Pa at 20°C: 8

Vapor Density:

Relative vapour density (air = 1): 4.5

Toxicity:

Oral-Rat LD50: 331 mg/kg

Flammability characteristics:

Open flame is flammable; high heat decomposes toxic nitrogen oxide gas

Explosive limit:

vol% in air: 1.2

Odor:

Penetrating odor, not as offensive as pyridine

PH:

Weak tertiary base

OH:

1.16e-11 cm3/molecule*sec

Dissociation Constants:

pKa= 4.90

Experimental Properties:

1 MG/L= 189 PPM; 1 PPM= 5.28 MG/CU M|Hygroscopic liquid, absorbs as much as 22% water. ... Forms water sol salts with strong acids: pK 9.5|Hydroxyl radical reaction rate constant = 1.16X10-11 cu cm/molecule-sec @ 24 °C

Air and Water Reactions:

Hygroscopic. Soluble in water.

Reactive Group:

Amines, Phosphines, and Pyridines

Reactivity Profile:

QUINOLINE is hygroscopic. It absorbs as much as 22% water. It is sensitive to light and moisture. It darkens on storage. This chemical is a weak base. A potentially explosive reaction may occur with hydrogen peroxide. It reacts violently with dinitrogen tetraoxide. It also reacts violently with perchromates. It is incompatible with (linseed oil + thionyl chloride) and maleic anhydride. It is also incompatible with strong oxidizers and strong acids. This chemical can be unpredictably violent. It dissolves sulfur, phosphorus and arsenic trioxide. It may attack some forms of plastics. It is a preparative hazard. (NTP, 1992)

Autoignition Temperature:

896 °F (USCG, 1999)|896 °F|480 °C

Heat of Combustion:

-8710 cal/g

Corrosivity:

May attack some forms of plastic

Critical Temperature & Pressure:

Critical temperature: 509 °C

See More Quinoline Properties 

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	Quinoline -99%	10.00 L	Mar 23, 2026
India	Quinoline	25 MT	Feb 10, 2026
Kuwait	Quinoline	200 G	Aug 23, 2024

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