DISH Network does not offer a CHN channel, if you are referring to the channel; CTN- Christian Television Network then that can be found on channel 9399.

chn

China is abbreviated as CHN.

If you mean CHN, yes, though it it is usually written as HCN, It consists of a carbon atom single bonded to hydrogen and triple bonded to nitrogen. The compound, known as hydrogen cyanide, is mildly acidic and extremely toxic.

Guanidinium salts are salts derived from guanidine - CHN(NH2)2.