CLA-2-28:S:N:N7:240 882035
Mr. James A. Wechsler
Paradigm Technologies, Inc.
P.O. Box 58081
Salt Lake City, Ut 841158
RE: The tariff classification of heavy isotope labeled amino
acids from Russia
Dear Mr. Wechsler :
In your letter dated January 18, 1993, you requested a
tariff classification ruling.
The compounds listed below are amino acids in which the
usual isotopes of nitrogen (nitrogen-14) and carbon (carbon-12)
have been replaced by heavy isotopes (nitrogen-15 and carbon-
13). Nitrogen-15 and Carbon-13 are not radioactive, however,
they are stable isotopes of nitrogen and carbon.
The applicable HTS subheading for L-Isoleucine 15N and 13C,
L-Lysine 15N and 13C, L-Arginine 15N and 13C, L-Proline 15N and
L-Leucine 15N will be 2845.90.0000, Harmonized Tariff Schedule of
the United States (HTS), which provides for isotopes other than
those of heading 2844; compounds, inorganic or organic, of such
isotopes, whether or not chemically defined. The rate will be
duty free.
This ruling is being issued under the provisions of Section
177 of the Customs Regulations (19 C.F.R. 177).
A copy of this ruling letter should be attached to the entry
documents filed at the time this merchandise is imported. If the
documents have already been filed, this ruling should be brought
to the attention of the Customs officer handling the transaction.
Sincerely,
Jean F. Maguire
Area Director
New York Seaport