Buying 5-bromo-5-nitro-1,3-dioxane (CAS 30007-47-7) for preservation applications means checking purity, free formaldehyde, moisture and related substances on the COA. This guide covers each specification item and supplier questions.
1. The Specification Sheet
| Parameter | Value | Why it matters |
|---|---|---|
| Appearance | White fine crystalline powder | Visual QC |
| Purity | 99% min | Active content |
| Appearance of solution (10% w/v in CH3OH) | Clear or nearly clear | Dissolution quality |
| Water content | NMT 0.5% | Stability, caking |
| Melting point | 57-62 °C | Identity / purity indicator |
| Formaldehyde | 5 ppm max | Regulatory/claim limit |
| Related substances | 0.2% max | Process purity |
2. What a COA Should Show
- Measured purity (HPLC/GC), melting point, water.
- Free formaldehyde result.
- Related substances by method.
- Batch traceability and retest date.
3. Verification on Arrival
- Check appearance and melting point first.
- Confirm free formaldehyde if you make regulatory claims.
- Keep the sample dry – the powder is moisture sensitive.
4. Packaging and Storage
- 25 kg fibre drums or bags with PE liner; smaller trial packs available.
- Store sealed, cool and dry, protected from light.
5. FAQ
Can I get a small sample for formulation testing?
Yes – trial quantities are available; contact us for details.
How should free formaldehyde be verified?
The COA reports it per the test method; for claims, confirm your in-house or third-party result matches the supplier’s limit.
6. References and Further Reading
- Supplier COA and MSDS for the specific grade.
This article is published for industrial and technical reference by PolyblueChem. Verify against the supplier’s COA and applicable regulations.
See our 5-bromo-5-nitro-1,3-dioxane chemistry guide. PolyblueChem supplies 5-bromo-5-nitro-1,3-dioxane (CAS 30007-47-7) – contact us for specifications and quotations.