Sr.
No.

Exposure condition

Time(h)

Drug remained
(mg)

% of drug
remained

%  R.S.D

S.E.

1

Photo degradation

1.0

7.39

73.90

0.45

0.070

0.5

8.08

80.08

0.61

0.056

2

Oxidation

 

3 % H2O2

1.0

      4.77

                47.70

           0.342

0.49

30 % H2O2

1.0

1.50

15.00

0.293

0.007

3

Base degradation

 

0.5 N NaOH

1.0

1.09

10.09

0.128

0.063

0.1 N NaOH

1.0

2.04

20.40

1.30

0.28

0.1 N NaOH

0.6

3.12

31.20

2.00

0.17

0.1 N NaOH

No heat

8.62

86.26

0.483

0.18

4

Acid  degradation

 

 

0.5 N HCl

1.0

3.068

30.68

0.12

0.04

0.1 N HCl

1.0

4.919

49.19

0.806

0.13

5

Wet degradation

1.0

10.02

100.02

2.00

0.014

6

Dry heat degradation

1.0

10.04

100.40

0.85

0.037

Table 2: Forced degradation studies of curcumin (95%).