DHHB (Diethylamino Hydroxybenzoyl Hexyl Benzoate)

Organic sunscreen or Chemical Sunscreen that can block UVA light, wavelength 320-390 nm, can work well with other sunscreens. And highly stable under sunlight. There is no faster deterioration problem when exposed to sunlight. Avobenzone

 

DHHB is used in expensive high-end sunscreens due to its high efficiency. And it is very stable in terms of UVA protection. DHHB is recommended only in sunscreen products used on the face. Due to the high price If the sunscreen used on the skin Instead, use high amounts of Zinc Oxide to protect against UVA rays, as they are less expensive. Although the nature of the product (May be white - difficult to spread - has a chance of separation) is not equivalent to DHHB DHHB does not cause white. Creamy texture, easy to spread And easy to mix, no separation problem

 

Summary of features of DHHB

- It is an organic sunscreen that can block UVA well and is highly stable. Even under sunlight There is no need to use another sunscreen in the formulation to improve stability. Unlike Avobenzone Which, although it is good UVA proof, but is not stable A combination of other sunscreens is needed to improve stability.

 

- Can be used in conjunction with Physical Sunscreen such as Zinc Oxide Or Titanium Dioxide Without affecting the stability Unlike Avobenzone That cannot be used in conjunction with Zinc Oxide , Titanium Dioxide and OMC Yes, because it will result in Avobenzone Lack of stability This makes it very limited to increasing the SPF and PA formulas, as there is a limit to the selection of other ingredients that can help increase the SPF and PA. OMC Which is a very effective UVB sunscreen

 

- Although unable to block UVB light, but when used together with other organic UVB sunscreen groups It can help to increase the SPF (the protection of UVB light) even more.

DHHB is a very effective UVB specific sunscreen. Compare Specific Extinction E1% / 1cm

 

 

 

 

FDA regulations for use of the substance DHHB In any kind of cosmetics

Europe (including Thailand): not more than 10%

Japan: not more than 10%

Products using this ingredient cannot be exported to the US as the US FDA has not approved DHHB.

 

Calculation of SPF / PA

For UVA: 5% DHHB = PA +++ and > 7.5% DHHB = PA ++++

For UVB: DHHB is not effective against UVB if used alone, but has the ability to boost the SPF of other UVB sunscreens when used together in the formula. (Please see more details below)

 

DHHB has the ability to add SPF to the UVB sunscreen in the formula (SPF-Booster).

According to the research results, it was found that In formulations that use DHHB in combination with other UVB sunscreens such as OMC, the use of DHHB increased from 2.5% to 10% increases the SPF of the formula (which is primarily derived from OMC) by 2-3 times.

 

Dissolving DHHB in various sunscreens and LipidSoft

Since DHHB is a powder, its formulation must be mixed with a solvent.

Soluble up to 39% in Octocrylene (DHHB 39% in Octocrylene 100%)

Soluble up to 39% in OMC (DHHB 39% in OMC 100%)

Soluble up to 36% in Homosalate (DHHB 36% in 100% Homosalate)

Soluble up to 30% in Octisalate (DHHB 30% in Octisalate 100%)

Soluble up to 23% in LipidSoft (DHHB 23% in LipidSoft 100%)

   

Examples of DHHB use

- Used in normal cream formulas (Day-Cream) for skin that is not outdoors. But travel outside the shade area during the day In order to protect the UVA light, especially at the level of 2-5%

- Especially used in sunscreen formulations For outdoor skin Or play outdoor sports Suitable for use in conjunction with Zinc Oxide Using Zinc Oxide Mainly 7-10% and use DHHB as a secondary 2.5-5% to protect against UVA light to get a PA ++++ and above and use other UVB sunscreens to achieve an SPF of at least 25.

 

Ready-made sunscreen products using DHHB As a sunscreen, do not refrigerate, refrigeration will cause the sunscreen effectiveness of group sunscreen. Organic / Chemical Decreased efficiency Due to recrytalization

 

Rate of use: 1-10% (1. 2.5-3% recommended when used in conjunction with Zinc Oxide To protect against UVA rays (5-7.5% is recommended if used as a single ingredient for UVA protection).

look: White-Light Yellow-Light Pink Flake Powder (White-slightly salmon granul powder. Turns yellow when melts)

Mixing: Mix in oil, please use heat to help dissolve at 80 degrees for no more than 30 minutes.

Storage: Keep at room temperature Avoid the sun, last for 3 years.

 

INCI:   Diethylamino Hydroxybenzoyl Hexyl Benzoate

 

Examples of products using DHHB

 

Shiseido Anessa Perfect UV Sunscreen SPF50 PA ++++

(DHHB works with Zinc Oxide and OMC In the formula using Zinc Oxide Mainly 8.37% to act as protection against UVA and 2% DHHB to enhance the function of Zinc Oxide By using in small quantities to control costs For UVB protection use OMC At a level 7.49%)

Biore UV Aqua Rich Watery Essence Sunscreen SPF50 + PA +++

(DHHB works primarily for protection against UVA light, the consumption level is likely at least 7.5% and using OMC   On the 10% scale, it works primarily as protection against UVB light).