Substance Data

Chemical Substances Information

CAS RN MITI Number Chemical Substance Name Chemical Structure
98-83-9 3-5 Isopropenylbenzene


Regulatory Classification

Regulatory Classification Cabinet Order No./Registration No. Chemical Substance Name date Remarks
Priority Assessment Chemical Substances (PACSs)  48  Isopropenylbenzene (synonym: alpha-Methylstyrene)  2011/04/01   
Existing chemical substances  -  2-Phenyl-propylene     
Type II Monitoring Chemical Substances (before amendment in FY 2009)  988  Isopropenylbenzene (synonym: alpha-Methylstyrene)  2010/03/19   
Type III Monitoring Chemical Substances (before amendment in FY 2009)  46  Isopropenylbenzene (synonym: alpha-Methylstyrene)  2006/07/18   


Screening Info

Publication year Human health effect Ecological effect Detailed assessment by experts Remarks
Exposure Class Hazard Class Priority Exposure Class Hazard Class Priority
2010 3 2 High 3 2 High Assessment has been conducted by the serial number of Type II Monitoring Chemical Substance (before amendment) and the serial number of Type III Monitoring Chemical Substance (before amendment).


Remarks


Information of Priority Assessment Chemical Substance

Information of designation

Classification Designated date No. MITI No. Name of Priority Assessment Chemical Substance Rationale for designation Remarks
PACS  2011/04/01  48  3-5  Isopropenylbenzene (synonym: alpha-Methylstyrene) 
Human health effect:x
Ecological effect:x
detailed assessment by experts for:


No. 48

Risk Assessment Phase 1-I

publication date Status of risk assessment publication source Remarks
2023/04/01 Risk Assessment Phase 1-I (human health effect)
2022/04/01 Risk Assessment Phase 1-I (human health effect)
2021/04/01 Risk Assessment Phase 1-I (human health effect)
2020/04/01 Risk Assessment Phase 1-I (human health effect)
2019/04/01 Risk Assessment Phase 1-I (human health effect)
2018/03/22 Risk Assessment Phase 1-I (human health effect)
2016/12/27 Risk Assessment Phase 1-I (human health effect)
2015/11/26 Risk Assessment Phase 1-I

Risk Assessment Phase 1-Ⅱ, 1-Ⅲ

publication date Status of risk assessment publication source Remarks
2023/04/01 Risk Assessment Phase 1-II (ecological effect)
2022/04/01 Risk Assessment Phase 1-II (ecological effect)
2021/04/01 Risk Assessment Phase 1-II (ecological effect)
2020/04/01 Risk Assessment Phase 1-II (ecological effect)
2019/04/01 Risk Assessment Phase 1-II (ecological effect)
2018/03/22 Risk Assessment Phase 1-II (ecological effect)
2016/12/27 Risk Assessment Phase 1-II (ecological effect)
2014/07/31 Risk Assessment Phase 1-II (ecological effect)






Other information

The list of high priority chemicals

CAS RN Chemical Substance Name(Reference) International Status of Collection Plan and report of sponsors Remarks
98-83-9 2-phenylpropene OECD HPV Program Assessed

Manufactured and/or imported quantities

Fiscal year MITI Number Registration No. Chemical Substance Name Classification Manufactured and/or imported quantities (t) Remarks
2021 3-5 48 Isopropenylbenzene (synonym: alpha-Methylstyrene) Priority Assessment Chemical Substances (PACSs) 47,711 MITI number: 3-5, 3-8
2020 3-5 48 Isopropenylbenzene (synonym: alpha-Methylstyrene) Priority Assessment Chemical Substances (PACSs) 33,399 MITI number: 3-5, 3-8
2019 3-5 48 Isopropenylbenzene (synonym: alpha-Methylstyrene) Priority Assessment Chemical Substances (PACSs) 34,865 MITI number: 3-5, 3-8
2018 3-5 48 Isopropenylbenzene (synonym: alpha-Methylstyrene) Priority Assessment Chemical Substances (PACSs) 34,491 MITI number: 3-5, 3-8
2017 3-5 48 Isopropenylbenzene (synonym: alpha-Methylstyrene) Priority Assessment Chemical Substances (PACSs) 30,426 MITI number: 3-5, 3-8
2016 3-5 48 Isopropenylbenzene (synonym: alpha-Methylstyrene) Priority Assessment Chemical Substances (PACSs) 33,213 MITI number: 3-5, 3-8
2015 3-5 48 Isopropenylbenzene (synonym: alpha-Methylstyrene) Priority Assessment Chemical Substances (PACSs) 35,584
2014 3-5 48 Isopropenylbenzene (synonym: alpha-Methylstyrene) Priority Assessment Chemical Substances (PACSs) 33,649 MITI number: 3-5, 3-8
2013 3-5 48 Isopropenylbenzene (synonym: alpha-Methylstyrene) Priority Assessment Chemical Substances (PACSs) 37,841 MITI number: 3-5, 3-8
2012 3-5 48 Isopropenylbenzene (synonym: alpha-Methylstyrene) Priority Assessment Chemical Substances (PACSs) 37,674 MITI number: 3-5, 3-8


Published information

publication source publication date Chemical Substance Name Published Result Judgement Remarks
Official Bulletin of Ministry of International Trade and Industry 1979/12/20 alpha-methylstylene Chemical substance determinated to be non or not highly bioaccumulative


Remarks 

Japan Existing Chemical Database [MHLW] (Link)


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