Apparent first-order rate constants (k_obs) for the photolysis of CMF at pH 8.0–12.0, and the rate constants for the formation of lumichrome (LC) (k₂), lumiflavin (LF) (k₃), keto acid (KA) (k₄) and dioxo-quinoxaline (DQ) (k₅), second-order rate constants (k′) for OH⁻ ion catalyzed reaction and quantum yields of photolysis (Φ).

pH	k obs × 104 (s−1) ±SD	t 1/2 (min)	k 2 × 104 (s−1)	k 3 × 104 (s−1)	k 4 × 104 (s−1)	k 5 × 104 (s−1)	k′ (M−1 s−1)	Φ a
8	1.53 ± 0.06	75.3	0.76	0.36	0.23	0.18	153.0	0.32
9	3.07 ± 0.12	36.5	1.08	0.91	0.66	0.42	31.7	0.34
10	3.75 ± 0.15	30.8	1.47	1.10	0.70	0.48	3.75	0.36
11	4.01 ± 0.14	28.7	1.63	1.13	0.75	0.50	0.40	0.39
12	4.15 ± 0.16	27.6	1.67	1.15	0.80	0.53	0.04	0.41

^aIt represents the overall quantum yields for the photolysis of CMF.