Summary of Classification and Labelling
Harmonised classification - Annex VI of Regulation (EC) No 1272/2008 (CLP Regulation)
General Information
Index Number EC / List no. CAS Number International Chemical Identification
617-001-00-2 203-733-6 110-05-4 di-tert-butyl peroxide

ATP Inserted / Updated: CLP00/ATP03
CLP Classification (Table 3)
Classification Labelling Specific Concentration limits, M-Factors, Acute Toxicity Estimates (ATE) Notes
Hazard Class and Category Code(s) Hazard Statement Code(s) Hazard Statement Code(s) Supplementary Hazard Statement Code(s) Pictograms, Signal Word Code(s)
Flam. Liq. 2 H225 H225 GHS02
GHS08
Dgr
Org. Perox. E H242 H242
Muta. 2 H341 H341

Signal Words Pictograms
Danger
GHS02
Flame
GHS08
Health hazard
Seveso III Data
Disclaimer: Please note that some of the substances covered by the Seveso Directive can belong to more than one Seveso categories. It will be up to the users to decide whether their substance or mixture fall in one or in more of these classification categories depending on the tonnage bands and the concentrations.
Please also note that ECHA is not an authority for the Seveso Directive and that the Seveso categorisation below is provided for information only. The Seveso III Directive (Directive 2012/18/EU repealing Directive 96/82/EC (Seveso II) from 1 June 2015) is the only authentic legal reference and that the information in this inventory does not constitute legal advice. For further information on Seveso, please ask your national authority.

Seveso Data
Seveso Substance Seveso Categories
Da P5a
P5b
P5c
P6b
Notified classification and labelling
General Information
EC / List no.
Name CAS Number
203-733-6 Di-tert-butyl peroxide 110-05-4

Notified classification and labelling according to CLP criteria
Classification Labelling Specific Concentration limits, M-Factors Notes Classification affected by Impurities / Additives

Additional Notified Information

Number of Notifiers

Joint Entries

Hazard Class and Category Code(s) Hazard Statement Code(s) Hazard Statement Code(s) Supplementary Hazard Statement Code(s) Pictograms, Signal Word Code(s)
Flam. Liq. 2 H225 H225 GHS08
GHS02
Dgr
State/Form
111 yes View details
Org. Perox. E H242 H242
Muta. 2 H341 H341
Flam. Liq. 2 H225 H225 GHS02
Dgr
State/Form
14 yes View details
Org. Perox. E H242 H242
Aquatic Chronic 3 H412 H412
Flam. Liq. 2 H225 H225 GHS02
GHS07
GHS08
Dgr
446 View details
Org. Perox. E H242 H242
Eye Irrit. 2 H319 H319
Muta. 2 H341 H341
Flam. Liq. 2 H225 H225 GHS02
Dgr
State/Form
203 View details
Org. Perox. E H242 H242
Flam. Liq. 2 H225 H225 GHS02
Dgr
176 View details
Org. Perox. E H242 H242
  H334
Flam. Liq. 2 H225 H225 GHS08
GHS02
Dgr
State/Form
124 View details
Org. Perox. E H242 H242
Muta. 2 H341 H341
Aquatic Chronic 3 H412 H412
Flam. Liq. 2 H225 H225 GHS08
GHS02
Dgr
87 View details
Org. Perox. E H242 H242
Muta. 2 H341 H341 (Suspected of ca...)
Flam. Liq. 2 H225 H225 GHS01
Dgr
State/Form
71 View details
Org. Perox. E H242 H242
Self-react. E H242 H242
Flam. Liq. 2 H225 H225 (H225) GHS02
Dgr
5 View details
Org. Perox. E H242 H242 (H242)
Acute Tox. 4 H302 H302 GHS07
Wng
State/Form
1 View details
Acute Tox. 4 H312 H312
Acute Tox. 4 H332 H332
Flam. Liq. 2 H225 H225 GHS08
GHS02
Dgr
State/Form
1 View details
Org. Perox. E H242 H242
Muta. 2 H341 H341
Aquatic Chronic 3 H412  
Flam. Liq. 2 H225 H225 GHS02
GHS08
Dgr
State/Form
1 View details
Org. Perox. E H242 H242
  H341
  H412
Flam. Liq. 2 H225 H225 GHS08
GHS02
Dgr
1 View details
Org. Perox. E H242 H242
  H341

Number of Aggregated Notifications: 13