Essential Guide azelaic acid

Manufacturing instructions:

1. The water phase (Phase A) is prepared by combining the ingredients. The water phase shall be alkaline as to (partially) neutralise Azelaic acid present in the oil phase. Ignoring to do so will inhibit emulsion formation. The water phase is heated to 70 75°C.

2. The oil phase (Phase B) is made by combining the ingredients and heating to 70-75°C. The oil phase shall be completely clear, and has a slight yellowish colour.

3. The oil phase is added to the water phase at 70-75°C while stirring with a planetary mixer. The mixture, that is still unstable, is stirred during 5 minutes (on a laboratory scale). Subsequently the mixture is homogenised using a high velocity rotor-stator mixer at maximum capacity. The pre-emulsion is cooled to 40-45°C and re-homogenised adding the preservative (Phase C). The obtained emulsion is white and is still low viscous. Upon further cooling the viscosity will continue to increase. At 25°C the fragrance is added (Phase D); stirring is continued during 15 minutes. 4. The pH is adjusted to the specifications with an 18% aqueous sodium hydroxide solution. The lotion is kept in quarantine for 5 days and committed for microbiological analysis. After 5 days the analytical data of the lotion may be adjusted to the specifications, if required. After the quarantine period the lotion may be committed for confectioning or transferred to bulk storage, provided it satisfies the specifications.

Results The results are at least promising. In conclusion, Azepur99® can be regarded as a functional cosmetic ingredient which can successfully be used in formulations for the management of skin disorders. The following visual scale was used:

Visual observation rating: 0-1 No improvement 2-3 Clearly noticeable improvement 4-6 Good improvement 7-9 Excellent improvement 10 Complete recovery

Volunteer # Gender

Age

Day #0

Day #5

Day #10 Day #15 Day #20 Day #25 Day #30

#1

Female

15

0

0

2

2

5

6

8

#2

Female

23

0

0

0

2

5

6

8

#3

Female

21

0

0

0

1

2

2

1

#4

Female

18

0

1

3

6

6

8

10

#5

Male

24

0

0

1

2

2

4

3

#6

Male

15

0

1

3

4

4

6

9

#7

Male

16

0

2

5

5

6

8

9

#8

Male

19

0

0

1

3

4

7

9

TABLE 16: Results

45

The highest grade of Azelaic acid for skin- and haircare • www.azeco-cosmeceuticals.com