Molekula
Antioxidant AO2246 DEF Stan 68-198 / 2,2-Methylene-bis-(4-methyl-6-tert-butylphenol)
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Antioxidant AO2246 DEF Stan 68-198, also known as 2,2-Methylene-bis-(4-methyl-6-tert-butylphenol), is a high-performance phenolic antioxidant used primarily in rubber, plastics, and fuels to prevent oxidative degradation and extend product lifespan. This chemical meets UK Defence Standard 68-198 specifications, ensuring reliability in demanding applications. CAS 119-47-1, molecular formula CH2[C6H2[C(CH3)3)(CH3)OH]2, molecular weight 340.50 g/mol. Store at ambient temperatures. Hazard classification: Danger (signal word), with specific risk warnings for environmental and health hazards as per GHS guidelines. Molekula supplies Antioxidant AO2246 DEF Stan 68-198 from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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100 g — £51.40 per pack ex VAT · £61.68 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White powder |
| Melting Point | ≥128 °C |
| Volatile Matter | ≤0.5% |
| Sieve Residue >63um | ≤3% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 89993617 |
| CAS Number | 119-47-1 |
| Molecular Formula | CH2[C6H2[C(CH3)3](CH3)OH]2 |
| Molecular Weight | 340.50 |
| SMILES | OC=1C(=CC(=CC1C(C)(C)C)C)CC2=CC(=CC(=C2O)C(C)(C)C)C |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29072905 |
| Tariff Code | 2907290090 |
Safety & GHS
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Serious Health Hazard
GHS08
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Hazardous to the Environment
GHS09
Hazard statements
- H360 May damage fertility or the unborn child
- H413 May cause long lasting harmful effects to aquatic life
Precautionary statements
- P263 Avoid contact during pregnancy/while nursing
- P264 Wash thoroughly after handling
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P308+313 IF exposed or concerned: Get medical advice/attention
- P501 Dispose of contents/container to an approved waste disposal plant
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is DEF Stan 68-198 / 2,2-Methylene-bis-(4-methyl-6-tert-butylphenol) used for?
This antioxidant is primarily used in lubricants, fuels, and plastics to prevent oxidation and extend shelf life, meeting UK Defence Standard (DEF STAN) 68-198 specifications.
What is the chemical formula and molecular weight of AO2246?
The formula is **CH₂[C₆H₂[C(CH₃)₃](CH₃)OH]₂** and the molecular weight is **340.50 g/mol**.
How should AO2246 be stored?
Store at **ambient temperature** in a cool, dry place, away from direct sunlight and incompatible materials.
What grades or purity levels of AO2246 does Molekula supply?
Molekula supplies **DEF STAN 68-198 compliant grade**, meeting military and industrial specifications for antioxidant performance.
Can Molekula supply AO2246 in bulk quantities?
Yes, we offer **bulk packaging options** (drums, IBCs, or custom solutions) for large-scale industrial and defense applications.
What documentation comes with an order of AO2246?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and DEF STAN 68-198 compliance certificate.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.