C33H50O6P2
604.7 g/mol
Industrial ChemicalWarning
3,9-bis(2,4-di-tert-butylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane
CAS26741-53-7EC247-952-5
Category
Industrial Chemical
Compound Class
Other
Primary Use
Antioxidant polymer stabilizer
This compound is a phosphite-based antioxidant used as a stabilizer in polymer materials, particularly polypropylene. It contains a spirocyclic structure with two hindered phenol groups, providing thermal and oxidative stability.
Antioxidant polymer stabilizerReducing agent in plastic formulations
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
ReferenceSame Category
Tert-butyl peroxyneodecanoate
CAS26748-41-4
Organic peroxide polymerization initiator
ReferenceSame Category
1-Bromo-3,4,5-trimethoxybenzene
CAS2675-79-8
chemical intermediate for synthesis
ReferenceSame Category
Diisodecyl phthalate
CAS26761-40-0
plasticizer for polyvinyl chloride
ReferenceSame Category
Glycidyl neodecanoate
CAS26761-45-5
Epoxy resin reactive diluent
Referencesame scaffold
Bis(2,6-di-tert-butyl-4-methylphenyl)pentaerythritol diphosphite
CAS80693-00-1
antioxidant for polymers
Safety Reference
Warning
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
H410Very toxic to aquatic life with long lasting effects
Customs Tariff Classification
The international HS code for 3,9-bis(2,4-di-tert-butylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane (CAS 26741-53-7) is 2920.29.
HS code (international, 6-digit)
2920.29
EU CN code (8-digit)
2920 29 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
3,9-bis(2,4-ditert-butylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane
InChIKey
AIBRSVLEQRWAEG-UHFFFAOYSA-N
SMILES
CC(C)(C)C1=CC(=C(C=C1)OP2OCC3(CO2)COP(OC3)OC4=C(C=C(C=C4)C(C)(C)C)C(C)(C)C)C(C)(C)C
Synonyms (33)
- ADK Stab PEP 24
- ADK Stab PEP 24G
- ANTIOXIDANT 6260
- ANTIOXIDANT TH 24
- AT 626
- Alkanox P 24
- Antioxidant 24
- Antioxidant 242
- Antioxidant 626
- Doverphos S 9432
- Irgafos 126
- Irganox 242
- MARK PEP 24
- Songnox 6260
- Ultranox 624
- Ultranox 626
- Weston 626
- Weston MDW 626
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