Guides for chemical buyers & lab teams
Grades, documentation, regulation, logistics and lab maths — written by chemists for procurement, QC and R&D teams.
HSN Codes for Chemicals: Chapter 28 vs 29 and GST Basics
Correct HSN classification drives duty, GST and export paperwork. Learn how Chapters 28 and 29 differ, when other chapters apply, and GST basics for buyers.
5 min readRegulatoryUS TSCA Import Certification Explained for Importers
Every chemical shipment entering the US needs a TSCA position. Learn positive and negative certification, Inventory status, exemptions and record-keeping.
5 min readRegulatoryImporting Chemicals into the EU: REACH Basics for Buyers
If you import chemicals into the EU, REACH may make you the registrant. Learn the thresholds, roles, exemptions and practical questions to ask suppliers.
5 min readRegulatoryImpurity Reference Standards: Types and Use in ANDA/DMF
Impurity standards are the evidence behind every impurity specification in a generic filing. Learn the types, thresholds and characterisation they require.
4 min readRegulatoryNitrosamine Impurities: Regulatory Limits and Testing
Since 2018, nitrosamines have reshaped impurity control in pharmaceuticals. This overview covers acceptable intakes, NDSRIs, risk assessment and analytical testing.
5 min readRegulatoryThe 16 Sections of a GHS Safety Data Sheet Explained
Every GHS Safety Data Sheet follows the same 16-section structure. Knowing what sits where helps you find the right information fast when it matters.
4 min read