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Polystyrene structure
Chemical Name:
Molecular Formula:
Formula Weight:
MOL File:

Polystyrene Properties

Melting point:
212 °C
Boiling point:
30-80 °C
1.06 g/mL at 25 °C
refractive index 
n20/D 1.5916
Flash point:
>230 °F
storage temp. 
Water Solubility 
Stable. Combustible. Incompatible with strong oxidizing agents.
Indirect Additives used in Food Contact Substances
175.125; 175.300; 175.320; 177.1200; 177.2600
CAS DataBase Reference
EWG's Food Scores
3 (Vol. 19, Sup 7) 1987
NIST Chemistry Reference
EPA Substance Registry System
Polystyrene (9003-53-6)
  • Risk and Safety Statements
Hazard Codes  Xi
Risk Statements  41
Safety Statements  26-36/37/39-24/25
RIDADR  2211
WGK Germany  3
RTECS  WL6475000
HazardClass  9
PackingGroup  III
HS Code  39039000
NFPA 704
1 0

Polystyrene price More Price(90)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 182427 Polystyrene average Mw ~280,000 by GPC 9003-53-6 25g $51.5 2020-08-18 Buy
Sigma-Aldrich 182427 Polystyrene average Mw ~280,000 by GPC 9003-53-6 1kg $184 2020-08-18 Buy
Alfa Aesar 041918 Polystyrene latex microsphere, 2 micron, 10 wt% dispersion in water 9003-53-6 15ml $184 2020-06-24 Buy
Alfa Aesar 041917 Polystyrene latex microsphere, 1 micron, 10 wt% dispersion in water 9003-53-6 15ml $184 2020-06-24 Buy
Strem Chemicals 06-2000 Styrene-divinylbenzene copolymer (20% cross-linked) 9003-53-6 50g $23 2020-06-24 Buy

Polystyrene Chemical Properties,Uses,Production

Chemical Properties

Poly(styrene) is white powder or beads, or clear solid.Polystyrene is rigid with excellent dimensional stability, has good chemical resistance to aqueous solutions, and is an extremely clear material.
Impact polystyrene contains polybutadiene added to reduce brittleness. The polybutadiene is usually dispersed as a discrete phase in a continuous polystyrene matrix. Polystyrene can be grafted onto rubber particles, which assures good adhesion between the phases.

Chemical Properties

The specific gravity of general purpose and impact polystyrene is 1.05. It can vary for copolymers. It is higher for some specialty grades. Density varies slightly with pressure, but for practical purposes, the polymer is noncompressible. In terms of heat-resistance, deflection temperatures range from about 66 to 99 °C (170 to 215 °F), depending upon the formulation. Continuous resistance to heat for polystyrene is usually 60 to 80 °C (140 to 175 °F). Time and load have a significant influence on the useful service temperature of a part.
Polystyrene is nontoxic when free from additives and residuals. It has no nutritive value and does not support fungus or bacterial growth. Dimensional stability of polystyrene resins is excellent. Mold shrinkage is small. The low moisture absorption (about 0.02%) allows fabricated parts to maintain dimensions and strength in humid environments.
General-purpose polystyrene is water white, and transmission of visible light is about 90%. Modifiers reduce this property, and translucence results. The refractive index is about 1.59; critical angle about 39. Polystyrene molecules do not have the same optical properties in all directions. When molecules become oriented in a given direction during fabrication, a double refraction occurs and a birefringence effect can be observed if the part is examined through a polarized lens under a polarized light source. Injection moldings often exhibit birefringence in a random pattern.


Containers, tubs, and trays formed from extruded impact polystyrene sheets are used for packaging a large variety of food. Biaxially oriented polystyrene film is thermoformed into blister packs, meat trays, container lids, and cookie, candy, pastry, and other food packages where clarity is required.
Housewares is another large segment of the use of polystyrenes. Refrigerator door liners and furniture panels are typical thermoformed impact polystyrene applications. Extruded profiles of solid or foamed impact polystyrene are used for mirror or picture frames, and moldings for construction applications.
General-purpose polystyrene is extruded either clear or embossed for room dividers, shower doors, glazings, and lighting applications. Injection molding of impact polystyrene is used for household items, such as flower pots, personal care products, and toys. General-purpose polystyrene is used for cutlery, bottles, combs, disposable tumblers, dishes, and trays. Injection blow molding can be used to convert polystyrene into bottles, jars, and other types of open containers.
Impact polystyrene with ignition-resistant additives is used for appliance housings, such as those for television and small appliances. Structural foam impact polystyrene modified with flame-retardant additives is used for business machine housings and in furniture because of its decorability and ease of processing. Consumer electronics, such as cassettes, reels, and housings, is a fast growing area for use of polystyrenes. Medical applications include sample collectors, petri dishes, and test tubes. In an effort to make homes and other buildings more energy efficient, the use of polystyrenes in extruded foam board with flame-retardant additives for walls and under slabs has experienced exceptional growth in recent years. Used as a sheeting material, extruded foam board complies with the requirements of the major building codes as well as federal and military specifications.


Packaging film; molded parts for automobiles, appliances, housewares, etc.; wire and cable coat- ing; food container closures; coated and laminated products; bottles; artificial grass and turfs; plastic pipe; wearing apparel (acid-dyed); fish nets; sur- gical casts; strapping; synthetic paper; reinforced plastics; nonwoven disposable filters.


ChEBI: A polymer composed of repeating ethyl benzene groups.


A synthetic polymer made from styrene (phenylethene). Expanded polystyrene is a rigid foam used in packing and insulation.


poly styrene: A clear glasslike materialmanufactured by free-radicalpolymerization of phenylethene(styrene) using benzoyl peroxide asan initiator. It is used as both a thermaland electrical insulator and forpacking and decorative purposes.


Questionable carcinogen.

Industrial uses

Polystyrene is brittle at room temperature,becomes soft at 80°C, and is often modified bycopolymerization. Traditionally, it is used infilm form for capacitors, and it remains competitivefor this application. Poly styrene is alsoused for coaxial-cable insulation, but in woundstrip or bead form, because the solid is not veryflexible.

Safety Profile

Questionable carcinogen with experimental tumorigenic data by implant. When heated to decomposition it emits acrid smoke and irritating fumes. See also POLYMERS, IN SOLUBLE.

Purification Methods

Precipitate polystyrene repeatedly from CHCl3 or toluene solution by addition of MeOH. Dry it in vacuo. [Miyasaka et al. J Phys Chem 92 249 1988.]

Polystyrene Preparation Products And Raw materials

Raw materials

Preparation Products

Polystyrene Suppliers

Global( 189)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Henan Tianfu Chemical Co.,Ltd.
0371-55170693 CHINA 22613 55
Zhonglan Industry Co., Ltd.
(86) 531-82956570
(86) 531-82956571 CHINA 4895 58
Hebei Guanlang Biotechnology Co., Ltd.
+8619930503282 whatapp+8619930503282
86-0311-66562153 CHINA 1444 58
Xiamen AmoyChem Co., Ltd
+86 592-605 1114 CHINA 6369 58
Hubei xin bonus chemical co. LTD
027-59338440 CHINA 23036 58
career henan chemical co
13203830695 0086-371-86658258
0086-371-86658258 CHINA 29872 58
Zhengzhou Alfa Chemical Co.,Ltd
+86 13343822234;; CHINA 11948 58
Mainchem Co., Ltd. +86-0592-6210733
+86-0592-6210733 CHINA 32440 55
Amikon Limited +86 592-5322116
+86-592-5165561 CHINA 9998 58
klamar reagent 4001650900
021-64897811 China 1989 55

View Lastest Price from Polystyrene manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2020-01-09 Polystyrene
US $9.80 / KG 1g ≥99% 100kg Career Henan Chemical Co
2020-01-06 Polystyrene
US $0.10 / KG 1KG 99.0% 1000 tons Shaanxi Dideu Medichem Co. Ltd
2018-10-09 PS200
US $99.00 / EA 1EA 999 pcs Amikon Limited

Polystyrene Spectrum

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