【Ava Said】Classification of Class 5.2 Organic Peroxides
Apr 12, 2024|
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Ava, the team leader of Evergreen Chemicals Organic Peroxide expert database and the brand director of Nouryon, participated in the drafting of OP safety standards and is well versed in the global supply relationship of peroxides.
AVA
Nouryon Brand DirectorClassification of Class 5.2 Organic Peroxides
Class 5.2 organic peroxides are organic substances containing a bivalent -O-O- structure that can be considered derivatives of hydrogen peroxide, where one or both hydrogen atoms are replaced by organic groups. These compounds are thermally unstable, capable of decomposing exothermically and self-accelerating when heated. The main types of organic peroxides include hydroperoxides, dialkyl peroxides, diacyl peroxides, peroxyesters, percarbonates, and ketone peroxides.
1.United Nations Transport Classification Method (A-G)
Organic peroxides are classified into seven types, A through G, based on their level of hazard. Type A peroxides are prohibited from transport, whereas Type G peroxides are not restricted by the provisions of Item 5.2. The "Dangerous Goods List" under the TDG includes 20 UN numbers associated with organic peroxides, detailing their respective hazard types.
The organic peroxides that are permitted for container transport are listed in the United Nations "Recommendations on the Transport of Dangerous Goods Model Regulations" under section 2.5.3.2.4 "Organic Peroxides Table." This table helps determine the classification, control temperature, and critical temperature required for the transport of the peroxides.
| Hazard Level | Risk Assessment | Maximum Allowable Quantity |
| Type A | Explosive | Banned |
| Type B | Very high | 25 kg |
| Type C | High | 50 kg (max.) |
| Type D | Medium | 50 kg |
| Type E | Low | 400 kg/450 l |
| Type F | Very low | IBC's/tanks |
| Type G | No | Unrestricted |
2.Storage Temperature Categories
| Room Temperature (20°C to 60°C) | Refrigerated (0°C to 20°C) | Deep Freeze (-20°C to 0°C) |
| Includes products like BUTANOX M-50 in the MEKP series, TRIGONOX C in the TBPB series, and TRIGONOX 101 in the twin series. | Includes TRIGONOX 21S in the TBPO series and PERKADOX 16 in the BCHPC series. | Includes TRIGONOX 23-C75 in the BNP series and TRIGONOX 25-C75 in the BPP series. |
3.Applications
| Curing Agents | MEKP：TRIGONOX V388, BUTANOX M-50, BUTANOX LPT-IN |
| TBPB：TRIGONOX C, TRIGONOX 23-C75 | |
| BPO：PERKADOX GB-50L, PERKADOX BTW50 | |
| TBPO: TRIGONOX 21S | |
| CHP: TRIGONOX K-80, TRIGONOX K-90 | |
| MIBKP: TRIGONOX HMA | |
| BCHPC: PERKADOX 16 | |
| Crosslinking Agents | TBIC: TRIGONOX BPIC-C75 |
| 2,5-Dimethyl-2,5-di(tert-butylperoxy) hexane：TRIGONOX 101 | |
| 2,4-dichloro dibenzoyl: PERKADOX OPC-50S-PS-MM | |
| 3M: TRIGONOX 29C90 | |
| TBHP: TRIGONOX A-W70 | |
| DTBP: TRIGONOX B | |
| DCP: PERKADOX BC-FF | |
| Initiators | LPO: LAUROX |
| BIBP: PERKADOX 14S-FL | |
| DTAC: TRIGONOX 122-C80 | |
| BPMO: PERKADOX PF-MT 40Z | |
| CH: TRIGONOX 22-E50 | |
| TAPH: TRIGONOX 121 | |
| TRIGONOX 141 | |
| TRIGONOX 289-IN VR |
4.Industry
| Rubber | BIBP: PERKADOX 14S-FL |
| 3M: TRIGONOX 29C90 | |
| DCBP: PERKADOX OPC-50S-PS-MM | |
| DCP: PERKADOX BC-FF | |
| Composite | MEKP: BUTANOX M-50 |
| TBPB: TRIGONOX C | |
| BPO: PERKADOX GB-50L | |
| Acrylic Acid | LPO: LAUROX |
| TBPV: TRIGONOX 25-C75 | |
| TBHP: TRIGONOX A-W70 | |
| Petrochemical | CHP: TRIGONOX K-80 |
| 301: TRIGONOX 301 | |
| PVC | LPO: LAUROX |
| BNP: TRIGONOX 23-C75 | |
| EHP, CNP, BNP, TAPP, TBPP |
