M9 Paper can be used in any weather, however, exposure to extremely high temperatures may produce
false readings. Scuffs, certain types of organic liquids, and DS2 also cause false readings. If the paper
shows spots or streaks of pink, red-brown, red-purple, or any shade of red, assume it has been exposed
to a chemical agent.
M9 Paper can be used in rain, snow, and sleet, but cannot be used to detect vapors or chemical agent in
water. This product will not stick to dirty, oily, or greasy surfaces. Contamination cannot be read under
red light or by a color-blind soldier. M9 Paper will give false reading when exposed to temperatures
above 125,F (52C), brake fluid, aircraft cleaning compound, and insect repellent.
c. M256/M256A1 Chemical Agent Detector Kit.
The M256/M256A1 Chemical Agent Detector Kit provides a quick means of identifying known
chemical agents. This kit is issued at squad level. It can detect the presence of blister, blood, and nerve
agents. Specific agents, which the kit can identify, are: Mustards, H and HD; Phosgene Oxime, CX;
Lewisite, L; Blood Agents, AC and CK; and Nerve Agents, V and G-type. The M256/M256A1 Kit is
limited because it cannot detect nor be used for sampling unknown agents, or it cannot detect choking
The kit consists of a plastic carrying case, which contains 12 sampler-detector cards, each individually
wrapped in a plastic foil laminated envelope; a booklet of ABC M8 Chemical Agent Detector Paper;
and, a set of operating instruction cards. The sampler-detectors contain the reagents and indicators to
identify specific chemical agents and color examples to indicate the presence or absence of the agent
being tested. The operating instruction cards contain complete instructions on the operation of the kit.
The product improvement model of the kit is the M256A1. Eel enzyme has been used to replace the
horse enzyme used in the original model in order to increase the sensitivity for the Nerve Agent test.
Sensitivity has been increased by a factor of ten.
The M256/M256A1 Chemical Agent Detector Kit cannot be used to detect chemical agents in water. In
high temperatures, or in the presence of DS2 or petroleum products, this kit may produce false readings.
Tests require 20-25 minutes. Unit efficiency goes down with temperature. At 25F, the kit is no longer