HS Code 2528
Natural Borates and Concentrates
HS code 2528 covers natural borates and their concentrates, including natural boric acid, used in the production of fertilisers, glass, and household detergents
4-digit Section VBulk
HS Code 2528 — Natural Borates and Concentrates
This code covers naturally occurring borate minerals and their concentrates, excluding those extracted from brines. These minerals are critical for manufacturing glass, ceramic glazes, detergents, and fertilizers.
What's included
- Kernite
- Tincal
- Natural calcium borates
- Natural boric acid (< 85% concentration)
What's excluded
- Borates from natural brine → use
2840(Chemically defined borates are classified in Chapter 28.) - Pure boric acid (> 85%) → use
2810(High purity boric acid is considered a chemical product.)
Common examples
- Raw kernite ore
- Natural sodium borate concentrate
- Calcined natural borate
Frequently asked questions
What is the concentration limit for natural boric acid here?
It must contain 85% or less of H3BO3 by dry weight to stay in 2528.
Trade & shipping notes
- Typical duty range: 0% - 6.5%
- Documentation: Chemical analysis certificate required to prove purity levels.
- Typical shipping mode: Bulk
- Top exporters: Turkey, USA, Chile
- Top importers: China, India, Germany
Related HS codes
Key takeaway
Turkey is the dominant global player for these essential glassmaking minerals.
Related HS codes
Tired of HS code lookups?
CargoMode extracts HS codes directly from commercial invoices, packing lists, and CMRs — no manual lookup, no transcription errors.