N-Butane Calibration Gas from Japan
Liquefied n-butane in trace concentrations for gas chromatography calibration standards. Under HTS 2711.13.00 as liquefied butane, used in laboratory quality control. Provided in certified cylinders with NIST traceability.
Duty Rate — Japan → United States
0%
Rate breakdown
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Include NIST or ISO 17025 calibration certificates for duty preference claims
• Specify exact ppm concentration to avoid reclassification as mixtures
• Use proper UN 1011 labeling for lab gas cylinders