Labelling color for detecting methamphetamine

Details Labelling color for detecting methamphetamine Labelling color for detecting methamphetamine

1993-08-05

1995-01-03

Alexander, Lyle A.

Chemistry: analytical and immunological testing

Heterocyclic carbon compound

436164, 436166, 436816, 436901, 548455, 435968, G01N 3300

Patent

active

053786343

ABSTRACT:
A labelling color which includes a pentamethine of the following formula (1): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each are a C.sub.1-6 alkyl group, and X is an anion.

REFERENCES:
patent: 4952336 (1990-08-01), Brynes et al.
patent: 5135863 (1992-08-01), Hu et al.

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