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General Information
- General Information
  - General Information Data Description
    - AJCSD_ID C004-666-31A CAS RN 100-42-5
      
      Chemical Substance Name Styrene
      
      Molecular Formula C8H8
      
      Molecular Weight 104
      
      SMILES C=CC1=CC=CC=C1
      
      Structure
- Synonym
  - Synonym Data Description
    - Synonym Ethenylbenzene
      
      Phenylethylene
      
      stylene
      
      Styrol
      
      Vinylbenzene
- Notes on CAS RN
  - Notes on CAS RN Data Description
    - Notes The CAS RN before replacement had been CAS RN 79637-11-9.

Laws and Regulations

Japan

Act on the Evaluation of Chemical Substances and Regulation of Their Manufacture, etc. (Chemical Substances Control Law ; CSCL)

Japan CSCL: Priority Assessment Chemical Substances Data Description Import Clearance Procedures[PDF] Notification of the Manufacturing Amount, etc[PDF]
- Registration Number
  47
  Date of Designation 2011/04/01
  
  MITI Number
  3-4
  
  Chemical Substance Name Styrene
  
  Reason for Inclusion Human Health / Ecosystem
  
  Remarks -
  
  Details to J-CHECK

Japan CSCL: Existing Chemical Substances Data Description Definition of the terms of Section 6 [PDF] Definition of the terms of Section 7 [PDF] Import Clearance Procedures[PDF] Notification of the Manufacturing Amount, etc[PDF]

MITI Number	3-4	Category	Section 3
Chemical Substance Name	Styrene
Remarks	-
Details	to J-CHECK
Remarks to Existing Chemical Substances of Industrial Safety and Health Act	Chemicals have been notified in accordance with the provisions of Chemical Substances Control Law by June 29, 1979
Details to Existing Chemical Substances of Industrial Safety and Health Act	to MHLW site (in Japanese)

Japan CSCL: Type II Monitoring Chemical Substances (before amendment) Data Description Import Clearance Procedures[PDF] Notification of the Manufacturing Amount, etc[PDF]
- Registration Number
  1065
  Date of Designation in the Official Gazette 2010/04/01
  
  MITI Number
  3-4
  
  Chemical Substance Name Styrene
  
  Remarks -
  
  Details to J-CHECK

Act on Confirmation, etc. of Release Amounts of Specific Chemical Substances in the Environment and Promotion of Improvements to the Management Thereof(PRTR-SDS Law)
- Japan: PRTR-SDS Law (until March 2023) Data Description Outline PRTR Law (METI site) Analysis of PRTR data
  - Classification I Cabinet Order Number
    1-240
    
    Cabinet Order Name Styrene
    
    Remarks -
    
    Basis of selection Hazard Data (in Japanese)
- Japan: PRTR-SDS Law (from April 2023) Data Description Outline PRTR Law (METI site)
  - JPSN(Japan PRTR-SDS Number)
    240
    Classification I Cabinet Order Number 1-275
    
    Cabinet Order Name Styrene
    
    Remarks -
    
    Basis of selection Hazard Data (in Japanese)

Industrial Safety and Health Act (ISHA)

Japan ISHA: Chemical Substances Requiring Labeling and Delivery of Documents, etc. Data Description GHS compatible model label creation method (MH LW site : in Japanese) Risk assessment implementation support tool (MHLW site : in Japanese) Target substances list (MHLW site: in Japanese) Responsibilities of Business Operators (JNIOSH site: in Japanese)

Cabinet Order Number	Attached table 2-1128 of Ordinance	Implementation	Effective April 1, 2025
Cabinet Order Name	Styrene
Range of Application for Label (weight%)	>=0.1
Range of Application for SDS (weight%)	>=0.1

Japan ISHA: Chemical substances that cause skin disorders, etc. and other chemical substances that must be handled with impermeable protective equipment etc. based on special chemical regulations. Data Description Target substances list, etc.(MHLW site: in japanese) Responsibilities of Business Operators (JNIOSH site: in Japanese)
- Substance Name Styrene
  
  Classification of Target Substances Special chemical regulations etc. Cutoff value(weight %) 1
  
  Implementation 2024/04/01
  
  Details to the GHS Classification

Japan ISHA: Dangerous Substances Data Description

Category	Inflammable Substances	Cabinet Order Number	4
Cabinet Order Name	Kerosene, light oil, turpentine oil, isopenthyl alcohol (synonym: isoamyl alcohol), acetic acid, and other substances having a flash point of 30 degrees Celsius or higher to lower than 65 degrees Celsius

Japan ISHA: Specified Chemical Substances Data Description Link to the Ordinance (JISHA site : in Japanese)

Category	Group-2 substances	Cabinet Order Number	Attached Table 3-2-22-2 of Cabinet order
Cabinet Order Name	Styrene
Range of Application (weight %)	>1
Special Notes	Substances under special supervision / Special organic solvent, etc.

Japan ISHA: Administrative Control Levels of Working Environment Evaluation Standards Data Description Working Environment Measurement (MHLW site : in Japanese)
- Registration Number
  20.2
  
  Kinds of substances Styrene
  
  Control Level 20ppm
  
  Remarks Information was provided by the Ministry of Health, Labour and Welfare.

Japan ISHA: Guidelines for Carcinogenic Substances Data Description
- Name Styrene
  
  Details to MHLW site (in Japanese)

Air Pollution Control Act

Japan Air Pollution Control Law Data Description Air & Transportation (MOE site)

Classification	Volatile Organic Compounds (VOC)	Cabinet Order Number	Article 2-4 of Act
Cabinet Order Name	Any organic compound (excluding substances specified by a Cabinet Order as not being sources from which suspended particulate matter or oxidants are generated) that is in a gaseous state at the time of its emission or dispersal into the atmosphere.
VOC Emission Inventory Substance Code	15-08-03
VOC Emission Inventory Substance Name	Styrene

Classification	Substances that may be classified as Hazardous Air Pollutants	Cabinet Order Number	111 of Central Environment Council 9th Report (Appendix 1)
Cabinet Order Name	Styrene

Water Pollution Prevention Act
- Japan Water Pollution Control Law Data Description Water / Soil / Ground Environment (MOE site)
  - Classification Designated Substances Cabinet Order Number
    Article 3-3-27 of Cabinet order
    
    Cabinet Order Name Styrene

Food Sanitation Act

Food Sanitation Act: Table 1 (1) in Appended table 1 of Specifications and Standards Notification; Base polymers (Plastics) Data Description The positive list system for food utensils, containers and packaging (MHLW)

Category	20. Cross-linking polyester
Number Name	1. Copolymer of one or more acids(A.)and one or more alcohols(B.) and/or epoxides(C.), cured with cross-linking agents(D.); D. Cross-linking agent; 11)styrene
Food category (Ac\|Fa\|Mi\|Al\|Ot)	○\|○\|○\|○\|○	Max. Temp./Synth. Resin Gr.	III/1
Requirements	The sum of hydroxy group and epoxy group (excluding cross-linkers) to 1 mol of the carboxy group: Not more than 3 mol: When used in UCP for milk/milk product or alcoholic beverage, the maximum temperature: I.

Category	21. Synthetic absorbent and ion exchenge polymer
Number Name	67. Copolymer not corresponding 1-66, polymer composed of (A.) and one or more substances(B.), or polymer composed of one or more substances(C.) as necessary modified with one or more substances(D.),includng modified with one or more substances(E.); A.; 5)styrene
Food category (Ac\|Fa\|Mi\|Al\|Ot)	○\|○\|○\|○\|○	Max. Temp./Synth. Resin Gr.	II/3

Category	28. Thermosetting polyurethane
Number Name	1. Copolymer composed of isocyanates(A.) with polyoles composed of monomer(B.); B. Monomer of polyol; 34)styrene
Food category (Ac\|Fa\|Mi\|Al\|Ot)	○\|○\|○\|○\|○	Max. Temp./Synth. Resin Gr.	I/1
Requirements	When used in a non-food contact part, the maximum temperature: III.

Food Sanitation Act: Table 1 (2) in Appended table 1 of Specifications and Standards Notification; Base polymers (Coatings) Data Description The positive list system for food utensils, containers and packaging (MHLW)

Category	1. Acrylic polymer
Number Name	11. Copolymer composed of one or more monomers[10] and following one or more monomers; 7)styrene
Food category (Ac\|Fa\|Mi\|Al\|Ot)	○\|○\|○\|○\|○	Max. Temp./Synth. Resin Gr.	III/1,3
Requirements	Monomers in category No.10: Not less than 50% in the base polymer components.

Category	8. Polyester
Number Name	1. Copolymer composed of one or more acids(A.) and one or more alcohols(B.), or modified with modifiers(C.); C. Modifier; 12)styrene
Food category (Ac\|Fa\|Mi\|Al\|Ot)	○\|○\|○\|○\|○	Max. Temp./Synth. Resin Gr.	III/1,3

Category	11. Polymer using formaldehyde as reaction raw material, not corresponding with 【1-10】
Number Name	7. Copolymer composed of formaldehyde, butanol and following one or more monomers; 2)styrene
Food category (Ac\|Fa\|Mi\|Al\|Ot)	○\|○\|○\|○\|○	Max. Temp./Synth. Resin Gr.	III/1

Category	18. Cross-linking agent for coating
Number Name	33. styrene
Food category (Ac\|Fa\|Mi\|Al\|Ot)	○\|○\|○\|○\|○	Max. Temp./Synth. Resin Gr.	III/1

Food Sanitation Act: Table 1 (3) in Appended table 1 of Specifications and Standards Notification; Base polymers (Trace amount monomer) Data Description The positive list system for food utensils, containers and packaging (MHLW)
- Number Name 4. Hydrocarbon; 14)styrene

Food Sanitation Act: Table 2 in Appended table 1 of Specifications and Standards Notification; Additives Data Description The positive list system for food utensils, containers and packaging (MHLW)
- Number
  892
  
  Name styrene
  
  Use Limit by Synthetic Resin Group [%] 1;5 2;5 3;5 4;- 5;1 6;1 7;-

Food Sanitation Act: Table 1 in Appended table 1 of Revised Positive List of Food Apparatus and Containers, Packaging (Base materials)(From June 1, 2025) Data Description Revised Positive List of Food Apparatus and Containers, Packaging (CAA)

Substance Code	03-516	Polymer group	1
Base Materials	Cross-linked polymer mainly composed of ester bonds
Classification (Type, processing, etc.)	essential monomer ; cross-linking agent
Name	styrene
Requirements	The sum of essential monomers: Not less than 50% of the polymer components

Substance Code	04-748	Polymer group	1
Base Materials	Cross-linking polymer of epoxy compound
Classification (Type, processing, etc.)	optional substance (including reaction products with essential monomers or epichlorohydrin)
Name	styrene
Requirements	Molecular weight of the part composed only of the optional substances (excluding reaction products with essential monomers or epichlorohydrin): Less than 1,000

Substance Code	06-714	Polymer group	1
Base Materials	Polymer mainly composed of siloxane bonds
Classification (Type, processing, etc.)	optional substance
Name	styrene
Requirements	Molecular weight of the part composed only of optional substance: Less than 1,000
Remarks	Can be applied only as the component of a polymer corresponding to serial No. 108(1) and 108(2) in Table 2.

Substance Code	10-116	Polymer group	1
Base Materials	Polymer with ion exchange ability and/or adsorption ability
Classification (Type, processing, etc.)	essential monomer
Name	styrene

Substance Code	11-737	Polymer group	1 or 3
Base Materials	Polymer mainly composed of urethane bonds
Classification (Type, processing, etc.)	optional substance
Name	styrene
Requirements	Molecular weight of the part composed only of optional substance: Less than 1,000

Substance Code	12-725	Polymer group	1 or 3
Base Materials	Polymer mainly composed of ester bonds
Classification (Type, processing, etc.)	optional substance
Name	styrene
Requirements	Molecular weight of the part composed only of optional substance: Less than 1,000

Substance Code	13-715	Polymer group	2
Base Materials	Polymer composed of alkenes as the main monomer
Classification (Type, processing, etc.)	optional substance
Name	styrene
Requirements	Molecular weight of the part composed only of the optional substances: Less than 1,000 (excluding ethyleneglycol condensate parts with the Mw ≥1000)

Substance Code	14-708	Polymer group	2
Base Materials	Polymer composed of conjugated diene hydrocarbon as the main monomer
Classification (Type, processing, etc.)	optional substance
Name	styrene
Requirements	Molecular weight of the part composed only of optional substance: Less than 1,000

Substance Code	15-102	Polymer group	2 or 3
Base Materials	Polymer composed of aromatic hydrocarbons as the main monomer
Classification (Type, processing, etc.)	essential monomer
Name	styrene
Requirements	The sum of essential monomers: Not less than 50% of the polymer components

Substance Code	16-733	Polymer group	3
Base Materials	Polymer composed of acrylic acids as the main monomer
Classification (Type, processing, etc.)	optional substance
Name	styrene
Requirements	Molecular weight of the part composed only of the optional substances: Less than 1,000 (excluding ethyleneglycol condensate parts with the Mw≥1000)

Substance Code	21-1105	Polymer group	4 or 5
Base Materials	Polymer used for coating that involves chemical reaction during film formation
Classification (Type, processing, etc.)	organic compound ; hydrocarbon
Name	styrene

Fire Service Act

Fire Service Act : Hazardous Materials Data Description

Number of cabinet order etc.	Article 2, Paragraph 7 of the Act, Appended Table 1, Category IV (4)
Category; Property	Category IV; Inflammable Liquids
Item	Class II petroleums
Property	Non-water soluble liquid
Designated quantity	1,000L
Sources	Hazardous Materials Disaster Information Support System, Hazardous Materials Data Book 2nd edition, MHLW Website; Sample SDS, Encyclopedia of Hazardous Materials

Laos
- Decision on Substance and Industrial Chemical Management
  - Laos: Decision on Substance and Industrial Chemical Management Data Description
    - Category Type II
      
      Substance name in English STYRENE MONOMER
      
      Substance name in local language ສະຕາຍລີນ ໂມໂນເມີ

Malaysia
- Classification, Labelling and Safety Datasheet of Hazardous Chemical (CLASS) Regulation 2013
  - Malaysia: Classification, Labelling and Safety Datasheet of Hazardous Chemical (CLASS) Regulation 2013 Data Description
    - Substance name in English Styrene, monomer
      
      Substance name in local language -
- Use and Standards of Exposure of Chemicals Hazardous to Health (USECHH) Regulation 2000
  - Malaysia: Use and Standards of Exposure of Chemicals Hazardous to Health (USECHH) Regulation 2000 Data Description
    - Category Schedule I
      
      Substance name in English Styrene, monomer
      
      Substance name in local language -

Philippines
- Toxic Substances and Hazardous and Nuclear Wastes Control Act
  - the Philippines: Toxic Substances and Hazardous and Nuclear Wastes Control Act (RA6969) Data Description
    - Category PICCS
      
      Substance name in English Benzene ethenyl
      
      Substance name in local language -
      
      Related Decree -
      
      Category PICCS
      
      Substance name in English Benzene, ethenyl-
      
      Substance name in local language -
      
      Related Decree -
      
      Category PICCS
      
      Substance name in English Benzene,ethenyl-
      
      Substance name in local language -
      
      Related Decree -
      
      Category PICCS
      
      Substance name in English Benzene,ethenyl..
      
      Substance name in local language -
      
      Related Decree -
      
      Category PICCS
      
      Substance name in English Styrene
      
      Substance name in local language -
      
      Related Decree -
      
      Category PICCS
      
      Substance name in English STYRENE (MONOMER)
      
      Substance name in local language -
      
      Related Decree -
      
      Category PICCS
      
      Substance name in English STYRENE MONOMER
      
      Substance name in local language -
      
      Related Decree -
      
      Category PICCS
      
      Substance name in English VINYL BENZENE, PHENYLETHYLENE
      
      Substance name in local language -
      
      Related Decree -
      
      Category PICCS
      
      Substance name in English Vinylbenzene, Phenylethylene
      
      Substance name in local language -
      
      Related Decree -

Thailand
- Hazardous Substances Act
  - Thailand: Hazardous Substances Act Data Description
    - Category Type 2
      
      Substance name in English styrene
      
      Substance name in local language -
      
      Condition -

Vietnam
- Law on Chemical / Luật hóa chất số 06/2007/QH12 ngày 21 tháng 11 năm 2007
  - Viet Nam:Law on Chemical:Decree 113/2017/ND-CP:List of chemicals subject to conditional industrial production and trading Data Description Law on Chemical Decree 113/2017/ND-CP Circular 32/2017/TT-BCT National Chemical Database System
    - Substance name in English Vinyl benzene (Styrene)
      
      Substance name in local language -
  - Viet Nam:Law on Chemical:Decree 113/2017/ND-CP:List of chemicals subject to be restricted in industrial production and trading Data Description Law on Chemical Decree 113/2017/ND-CP Circular 32/2017/TT-BCT National Chemical Database System
    - Substance name in English Vinyl benzene (styrene)
      
      Substance name in local language -
  - Viet Nam:Law on Chemical:Decree 113/2017/ND-CP:List of chemicals subject to compulsory declaration Data Description Law on Chemical Decree 113/2017/ND-CP Circular 32/2017/TT-BCT National Chemical Database System
    - Substance name in English Vinyl benzene (Styrene)
      
      Substance name in local language -
      
      Substance name in English Vinyl benzene
      
      Substance name in local language -

World Customs Organization
- International Convention on the Commodity Description and Coding Systems (HS Convention)
  - HS Code: Section VI “Products of the Chemical or Allied Industries" Data Description
    - Chapter 29 Chapter name Organic chemicals
      
      Heading 2902 Substance name (Heading) Cyclic hydrocarbons
      
      HS Code 2902.50 Substance Name Styrene

Chemical Hazard and Risk Information

Japan

GHS Classification Results by the Japanese Government

NITE Japan-GHS Data Description GHS information
- Edition version_3
  
  Chemical Substance Name Styrene monomer
  
  Classification Result To the result webpage To the Excel flie

GHS Classification Results by the Japanese Government Data Description GHS Information

Year of implementation /renewal	2006	ID	151_H18_new
Chemical Substance Name	Styrene
Classification Result	To the resut webpage To the Excel flie

Year of implementation /renewal	2007	ID	151_H19_re
Chemical Substance Name	Styrene
Classification Result	To the resut webpage To the Excel flie

Year of implementation /renewal	2015	ID	H27-B-078/C-130B_P
Chemical Substance Name	Styrene
Classification Result	To the resut webpage To the Excel flie

Year of implementation /renewal	2020	ID	R02-B-111-MHLW
Chemical Substance Name	Styrene
Classification Result	To the resut webpage To the Excel flie
Remarks	The reclassification result of only physical and health hazard classes. As for environmental hazard classes, please see the result in FY2015.

Year of implementation /renewal	2023	ID	R05-C-158B-MOE
Chemical Substance Name	Styrene monomer
Classification Result	To the resut webpage To the Excel flie

Chemical Substances Hazard Assessment Report / Initial Risk Assessment Report

Chemical Substances Hazard Assessment Report / Initial Risk Assessment Report Data Description Guidance for Initial Risk Assessment ver.1 (in Japanese) Guidance for Initial Risk Assessment ver.2 (in Japanese)

Report Number	No.52
Assessed Chemical Substance Name	Styrene
Details	Hazard Assessment Report (in Japanese)	Date of publication/ renewal	2006/04
	Details Initial Risk Assessment Report (in Japanese)	Date of publication/ renewal	2007/08
	Details Summary of Initial Risk Assessment Report	Date of publication/ renewal	2010/05

Malaysia
- GHS Classification Results by the Malaysian Government
  - GHS Classification Results by the Malaysian Government Data Description ELSA ESSA User Guide and Printing Instruction of ELSA User Guide and Printing Instruction of ESSA
    - Chemical Name Styrene, monomer
      
      Substance name in local language -
      
      Classification Result GHS Classification Result in Malaysia

AJCSD_ID	C004-666-31A	CAS RN	100-42-5
Chemical Substance Name	Styrene
Molecular Formula	C8H8
Molecular Weight	104
SMILES	C=CC1=CC=CC=C1
Structure

Synonym	Ethenylbenzene
	Phenylethylene
	stylene
	Styrol
	Vinylbenzene

Registration Number	47	Date of Designation	2011/04/01
MITI Number	3-4
Chemical Substance Name	Styrene
Reason for Inclusion	Human Health / Ecosystem
Remarks	-
Details	to J-CHECK

Registration Number	1065	Date of Designation in the Official Gazette	2010/04/01
MITI Number	3-4
Chemical Substance Name	Styrene
Remarks	-
Details	to J-CHECK

Classification	I	Cabinet Order Number	1-240
Cabinet Order Name	Styrene
Remarks	-
Basis of selection	Hazard Data (in Japanese)

JPSN(Japan PRTR-SDS Number)	240	Classification	I	Cabinet Order Number	1-275
Cabinet Order Name	Styrene
Remarks	-
Basis of selection	Hazard Data (in Japanese)

Substance Name	Styrene
Classification of Target Substances	Special chemical regulations etc.	Cutoff value(weight %)	1
Implementation	2024/04/01
Details	to the GHS Classification

Registration Number	20.2
Kinds of substances	Styrene
Control Level	20ppm
Remarks	Information was provided by the Ministry of Health, Labour and Welfare.

Classification	Designated Substances	Cabinet Order Number	Article 3-3-27 of Cabinet order
Cabinet Order Name	Styrene

Number	892
Name	styrene
Use Limit by Synthetic Resin Group [%]	1;5 2;5 3;5 4;- 5;1 6;1 7;-

Category	Type II
Substance name in English	STYRENE MONOMER
Substance name in local language	ສະຕາຍລີນ ໂມໂນເມີ

Substance name in English	Styrene, monomer
Substance name in local language	-

Category	Schedule I
Substance name in English	Styrene, monomer
Substance name in local language	-

Category	PICCS
Substance name in English	Benzene ethenyl
Substance name in local language	-
Related Decree	-

Category	Type 2
Substance name in English	styrene
Substance name in local language	-
Condition	-

Substance name in English	Vinyl benzene (Styrene)
Substance name in local language	-

Substance name in English	Vinyl benzene
Substance name in local language	-

Chapter	29	Chapter name	Organic chemicals
Heading	2902	Substance name (Heading)	Cyclic hydrocarbons
HS Code	2902.50	Substance Name	Styrene

Edition	version_3
Chemical Substance Name	Styrene monomer
Classification Result	To the result webpage To the Excel flie

Chemical Name	Styrene, monomer
Substance name in local language	-
Classification Result	GHS Classification Result in Malaysia