Possible intermediate products during the degradation process of rhodamine B.

Serial number	Mass-to-charge ratio	Intermediate product
I	443.23	Rhodamine B
II	415.20	N,N-Diethyl-N′-ethylrhodamine
III	387.17	N,N-Diethyl-rhodamine
IV	387.17	N-Ethyl-N′-ethylrhodamine
V	359.14	N-Ethylrhodamine
VI	289.15	7,9-Dihydro-2-methyl-7-methylene-10-phenylanthracene
VII	170.86	3-Nitro-6-methylphenol
VIII	126.86	3-Amino-6-methylcyclohexadienol