Propylene R1270

product-124-99

Molecular Structure of Propylene

I. Core Foreign Trade Specifications (for Customs Declaration & Ocean Shipment)

CAS No.: 115-07-1

UN Number: UN1077, Hazard Class: Class 2.1 Flammable Gas

EINECS No.: 204-062-1

HS Code: 2901220000 (Liquefied Propylene)

Purity: Industrial Grade ≥99.5%; Polymer Grade ≥99.9%

II. Physical & Chemical Properties

Physical Parameters

Appearance: Colorless gas at ambient temperature with faint petroleum sweet odor; liquefies under pressurization or low temperature

Molecular Weight: 42.08

Melting Point: -185°C; Boiling Point: -47.7°C

Liquid Density (20℃): 513.9 kg/m³; Vapor Density: 1.905 kg/m³ (heavier than air)

Flash Point: -108°C; Autoignition Temperature: 455~460°C

Explosion Limit (by volume): 2%～11.1% (high risk of flammability and explosion)

Solubility: Slightly soluble in water, freely soluble in ethanol, diethyl ether and hydrocarbon solvents

Chemical Properties

Contains carbon-carbon double bond (C=C) with high chemical reactivity; capable of addition, polymerization, oxidation, ammoxidation and oxo-synthesis reactions. It is a core petrochemical feedstock, second only to ethylene in industrial importance.

Butadiene Is Used in The Synthesis Of Synthetic Rubber

III. Major Downstream Applications (Sorted by Consumption Volume)

Polypropylene (PP, over 60% of total propylene consumption): woven plastic sacks, injection-molded parts, nonwoven fabrics, automotive modified plastics, BOPP films, disposable food containers

Propylene Oxide (PO): polyether polyols (for PU foaming), propylene glycol, antifreeze, nonionic surfactants

Acrylonitrile (AN): acrylic fiber, ABS resin, nitrile butadiene rubber (NBR)

Butanol & 2-Ethylhexanol: plasticizers for coatings, acrylate esters, pharmaceutical intermediates

Isopropanol, Acetone, Acrylic Acid, EPDM: solvents, synthetic resins and rubber products

IV. Production Sources

By-product from naphtha cracking in ethylene plants (dominant global route)

Propane Dehydrogenation (PDH, newly dominant domestic process)

By-product from FCC fluid catalytic cracking in refineries

Methanol-to-Olefins (MTO)

V. Storage, Transportation & Hazard Safety (International Logistics)

1. Packaging & Shipment

Bulk cargo: stored & transported via cryogenic pressurized spherical tanks, LPG tank trucks and LPG carriers; small lots: high-pressure steel cylinders (Packing Group O52)

Ocean transport: loaded in IG tanks on liquefied gas carriers, classified as Class 2.1 dangerous goods

2. Safety Hazards

Highly flammable and explosive; vapors sink and accumulate in low-lying areas with potential flashback from distant ignition sources; keep away from open flame, static electricity and oxidizing agents.

Health hazard: high-concentration inhalation causes narcosis and asphyxiation; liquid propylene leads to cryogenic frostbite upon skin contact.

Storage requirement: cool & ventilated spherical tank yard equipped with combustible gas detectors and sprinkler fire-fighting system; isolate from oxygen and strong oxidants.

VI. Trade Remarks

Futures trading: Listed product on Dalian Commodity Exchange (DCE), key petrochemical futures variety in China; spot market quotes split into Polymer Grade (exclusively for PP production) and Industrial Grade.

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