NIST SRM 972a Vitamin D Metabolites in Human Serum
Certified reference material of human serum with accurately determined concentrations of 25-hydroxyvitamin D2 and D3 metabolites. Classified under HTS 3822.90.00.00 for its role in standardizing clinical assays for vitamin D deficiency testing. Certified values traceable to SI units for LC-MS/MS method validation.
Import Duty Rates by Country of Origin
| Origin Country | MFN Rate | Ch.99 Surcharges | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | +10.0% | 10% |
| 🇲🇽Mexico | Free | +10.0% | 10% |
| 🇨🇦Canada | Free | +10.0% | 10% |
| 🇩🇪Germany | Free | +10.0% | 10% |
| 🇯🇵Japan | Free | +10.0% | 10% |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for direct diagnostic testing use
Serum-based products for immediate medical diagnosis classified as pharmaceutical goods.
If simple vitamin solution calibrator
Pure vitamin preparations without biological matrix certification are general biochemical reagents.
If packaged as antisera or blood fractions
Human serum products with immunological properties fall under blood-related products.
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Import Tips & Compliance
• Biohazard declaration and IATA shipping compliance for human serum matrix; include NIST CoA
• FDA biologics import permit may be required
• Maintain -80°C cold chain documentation
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