144 MULTIFUNCTIONALS
TABLE 3: PRODUCT FACT SHEET: GEOGARD BOOST PGC Structure
H3 C O
Product Information CAS number Name
Alternate names Molecular formula Molecular weight Form
Colour
ISO 16128 natural origin index Renewable carbon index EWG hazard score
This means no skin reaction was observed on individuals with normal or sensitive skin types; propylene glycol caprylate performed comparably to water when applied to the skin in this study. Therefore, propylene glycol caprylate is suitable for all skin types and does not cause skin irritation sometimes associated with propylene glycol.
Skin hydration Glycerin has been used for decades within the beauty and personal care industry and is the go-to molecule for skin hydration claims. Arxada carried out a skin hydration study to quantitively assess the ability of test samples to hydrate the skin across various timepoints. In this study (Figure 5) we were able to
0.75% Sodium Benzoate
7.00 6.00 5.00 4.00 3.00 2.00 1.00
Day 0 Day 2 Day 7 Day 14 0.25% Propylene Glycol Caprylate 0.75% Sodium Benzoate and
7.00 6.00 5.00 4.00 3.00 2.00 1.00
Day 0 Day 2 Day 7 Day 14
Figure 2: Expanding the pH range of organic acids. Shampoo pH 6.5
PERSONAL CARE April 2024
7.00 6.00 5.00 4.00 3.00 2.00 1.00
7.00 6.00 5.00 4.00 3.00 2.00 1.00
31565-12-5 Propylene glycol monocaprylate
1,2 propanediol caprylate, caprylic acid monoester with 1.2 propanediol C11H2203 202.2 Liquid
Clear to light yellow/amber 1 1
1 (Low risk)
demonstrate hydration potentiation of Glycerin when used in conjunction with 1% propylene glycol caprylate. In a second study, Arxada compared
the skin hydration effect of 1% propylene glycol caprylate in a basic emulsion to some benchmark chemistries, over a four-hour period. Results shown in Figure 6 illustrated how
skin treated with 1% propylene glycol caprylate experienced improved skin moisturisation compared to 1% ethylhexylglycerin and 1% caprylyl glycol after four hours.
Improved skin feel To gain a better understanding of the sensory feel of propylene glycol caprylate on the skin, a sensory panel test was carried out. Participants
0.6% Potassium sorbate Day 0 Day 2 Day 7 Day 14
0.6% Potassium sorbate and 0.4% Propylene Glycol Caprylate
Day 0 Day 2 Day 7 Day 14
Figure 3: Broad spectrum preservative potentiation. Skin lotion pH 5.5
7.00 6.00 5.00 4.00 3.00 2.00 1.00
7.00 6.00 5.00 4.00 3.00 2.00 1.00
rated their agreement on a scale of 1 (strongly disagree) to 9 (strongly agree) for attributes such as skin tackiness. The skin feel of 1% propylene glycol caprylate in combination with 1% glycerin was compared to that of 1% glycerin alone in a basic emulsion. The results show that propylene glycol
caprylate enhances the skin feel properties of glycerin in terms of a non-sticky feel on skin (Figure 7).
Skin microbiome The microbiome is the community of microorganisms (bacteria, fungi, viruses, and yeast) that live on and in the human body, providing a range of functions that are essential to our health. These functions include aiding
0.6% Phenoxyethanol O
OH CH3
Day 0
Day 2
Day 7
Day 14 0.4% Propylene Glycol Caprylate 0.6% Phenoxyethanol and
Day 0
Day 2
Day 7
Day 14
Figure 4: Improving preservative speed of kill. Skin lotion pH 5
www.personalcaremagazine.com
Recovery Log CFU/g
Recovery Log CFU/g
Recovery Log CFU/g
Recovery Log CFU/g
Recovery Log CFU/g
Recovery Log CFU/g
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88 |
Page 89 |
Page 90 |
Page 91 |
Page 92 |
Page 93 |
Page 94 |
Page 95 |
Page 96 |
Page 97 |
Page 98 |
Page 99 |
Page 100 |
Page 101 |
Page 102 |
Page 103 |
Page 104 |
Page 105 |
Page 106 |
Page 107 |
Page 108 |
Page 109 |
Page 110 |
Page 111 |
Page 112 |
Page 113 |
Page 114 |
Page 115 |
Page 116 |
Page 117 |
Page 118 |
Page 119 |
Page 120 |
Page 121 |
Page 122 |
Page 123 |
Page 124 |
Page 125 |
Page 126 |
Page 127 |
Page 128 |
Page 129 |
Page 130 |
Page 131 |
Page 132 |
Page 133 |
Page 134 |
Page 135 |
Page 136 |
Page 137 |
Page 138 |
Page 139 |
Page 140 |
Page 141 |
Page 142 |
Page 143 |
Page 144 |
Page 145 |
Page 146 |
Page 147 |
Page 148 |
Page 149 |
Page 150 |
Page 151 |
Page 152 |
Page 153 |
Page 154
