Betahistine dihydrochloride

Etilefrine hydrochloride

1/t (S-1)

(M)

1/t (S-1)

(M)

5.56 x 10-4

9.26 x 10-4

1.67 x 10-3

1.91 x 10-5

2.39 x 10-5

2.87 x 10-5

5.55 x 10-4

1.19 x 10-3

1.67 x 10-4

4.13 x 10-5

5.05 x 10-5

5.97 x 10-5
Table 6: Values of reciprocal of time taken at fixed absorbance for different initial concentrations of betahistine dihydrochloride and etilefrine hydrochloride.