What to Specify When Buying This Pyrimidine Carbamate
4,6-Dimethoxy-2-(phenoxycarbonyl)aminopyrimidine (CAS 89392-03-0) is quoted against a short specification built around appearance, assay and water content. Because the material is a crystalline intermediate for low-dose crop-protection chemicals, consistency between batches is as important as the headline purity. This guide covers typical specifications, packaging, documentation and storage. For the underlying chemistry, see the technical overview.
Typical Specifications
| Parameter | Specification |
|---|---|
| Appearance | Off-white or white crystalline powder |
| Assay | 98% min |
| Water | 0.2% max |
| Molecular formula | C13H13N3O4 |
| Molecular weight | 275.26 g/mol |
Why These Parameters Matter
- Appearance. An off-white to white crystalline powder indicates a clean, well-crystallised product free of coloured impurities.
- Assay. A minimum of 98% ensures enough active intermediate for the coupling step and limits unwanted by-products in the finished active.
- Water. The carbamate is moisture-sensitive, so a 0.2% max limit keeps the material stable and the downstream reaction reproducible.
Because the finished actives are used at very low dose, buyers often request a batch COA with these parameters reported together, and sometimes additional identity confirmation.
Packaging and Storage
The material is a crystalline solid and is supplied in the packaging size that fits the order, typically fibre drums or lined drums for bulk quantities. It should be stored cool and dry with the container tightly closed, away from heat, moisture and strong oxidants, and handled with appropriate personal protective equipment to limit dust.
Documentation: COA and SDS
A reliable supplier provides a batch certificate of analysis (COA) that reports appearance, assay and water content, together with an up-to-date safety data sheet (SDS/MSDS). For customers in regulated markets, confirming the regulatory classification and documentation early can avoid delays later.
Supplier Qualification Checklist
- Confirm whether the supplier manufactures or trades the material, and the country of origin.
- Check that the quoted grade and specification match the COA you will receive.
- Confirm consistent batch-to-batch assay and water content, not just a single lot.
- Verify lead time, packaging and shipping terms for your production schedule.
- Confirm that COA and SDS are supplied and that any regulatory documents you need are available.
Frequently Asked Questions
What purity is typical for this intermediate?
Industrial grades are commonly specified at 98% min assay with 0.2% max water, supplied as an off-white to white crystalline powder.
Why is water content controlled?
The phenyl carbamate is moisture-sensitive, so a 0.2% max limit protects the material and keeps downstream coupling chemistry reproducible.
Does it come with a COA and SDS?
Yes. A batch COA covering appearance, assay and water, plus an up-to-date SDS, should be supplied.
Where can I buy this pyrimidine carbamate?
PolyBlueChem supplies 4,6-dimethoxy-2-(phenoxycarbonyl)aminopyrimidine (CAS 89392-03-0) with COA and MSDS. Contact our team for specifications, packaging and a quotation.
References
- PubChem Compound Summary for 4,6-dimethoxy-2-(phenoxycarbonyl)aminopyrimidine (CAS 89392-03-0).
- Supplier specification sheets for the phenyl carbamate of 2-amino-4,6-dimethoxypyrimidine.
- Guidance on handling and storing moisture-sensitive fine-chemical intermediates.
Disclaimer: This article is provided for general informational purposes only and does not constitute technical, regulatory or safety advice. Always refer to the current safety data sheet and applicable regulations before handling this material.