What is the importance of HLB

HLB numbers allow the ability of the surfactant to stabilise o/w or w/o emulsions to be predicted. Surfactants with HLB values between 4 and 6 generally stabilize w/o emulsions whereas HLB values between 8 and 18 would stabilize o/w emulsions (Bos and van Vliet, 2001; Pichot et al., 2010).

What is HLB and its importance?

Hydrophile Lipophile Balance (HLB) is a way of measuring a substances solubility within water or oil. The HLB system was created as a tool to make it easier to use nonionic surfactants. The HLB system enables you to assign a HLB value to a surfactant and a HLB requirement to the application for that surfactant.

What is HLB in physical pharmacy?

The hydrophilic-lipophilic balance (HLB) number indicates the polarity of the molecules in a range of 1-40, with the most commonly used emulsifiers having a value between 1 and 20. The HLB number increases with increasing hydrophilicity. Lipophilic tails align with oil Hydrophilic heads align with water.

What is the application of HLB value?

An HLB value of 0 corresponds to a completely lipophilic/hydrophobic molecule, and a value of 20 corresponds to a completely hydrophilic/lipophobic molecule. The HLB value can be used to predict the surfactant properties of a molecule: < 10 : Lipid-soluble (water-insoluble) > 10 : Water-soluble (lipid-insoluble)

What does HLB number mean?

The HLB system, which stands for “Hydrophilic Lipophilic Balance”, indicates how the proportion of those groups will affect surfactant behavior in emulsions. HLB numbers correspond to the degree of water or oil solubility of a particular surfactant. Lower HLB numbers indicate better oil (non-polar) solubility.

Who develops HLB system?

4.1b Hydrophile-lipophile balance (HLB) The empirical HLB notion was developed by William C. Griffin4) in 1949 who proposed to compute the HLB value as the molecular weight percent of the water-loving portion of the surfactant divided by 5.

What is the HLB value of Tween 80?

Tween 80 has an HLB value of 15, within the range of HLB 8–18 for oil-in-water (O/W) emulsifiers.

What is HLB Wikipedia?

HLB International is a global network of independent advisory and accounting firms, comprising member firms in 158 countries. HLB International member firms offer audit, accounting, tax and business advisory services.

What are the limitations of HLB?

Disadvantages of the HLB system The inability to take into account: (i) the effect of temperature (ii) the presence of additives (iii) the concentration of emulsifying agents. A detailed description of the HLB system is discussed by Griffin and reviewed by Friberg.

What is HLB system and its method for estimation?

In the HLB System, each emulsifier is assigned a numerical value which we call its HLB. … An emulsifier that is lipophilic in character is assigned a low HLB number (below 9.0), and one that is hydrophilic is assigned a high HLB number (above 11.0). Those in the range of 9-11 are intermediate.

Article first time published on

What is HLB What is HLB value of Acacia?

The hydrophile-lipophile balance (HLB) of acacia has been determined in the presence of various ethylene oxide derivatives of sorbitan fatty acid esters. … A revised HLB value of 11.87 for acacia has been proposed.

What is the HLB value of wetting agent?

Wetting agents have an HLB between 6 and 9, indicating a slightly higher molecular weight of the non-polar, hydrophobic part. In a bi-phase system they concentrate at the interface between both phases e.g. liquids, solids or air and thereby lower the surface tension between them.

How is HLB calculated?

Using the following equation: HLB desired = ( % surfactant A ) × ( HLB Surfactant A ) + ( % surfactant B ) × ( HLB Surfactant B . ) A blend of surfactant A, HLB = 7.8, and surfactant B, HLB = 13.4 produces a combination that is water soluble and contributes other desired properties.

What is the HLB of mineral oil?

The average HLB required to make an oil in water emulsion of mineral oil is 12.

Is zwitterionic a surfactant?

Zwitterionic or amphoteric surfactants are surfactants that carry both a positive and a negative charge. As stated, these charges can either be permanent or dependent on the pH value.

What is the HLB of Tween 20?

Commercial NameChemical NameHLB ValueTween 20Polyoxyethylene sorbitan monolaurate16.7Tween 21Polyoxyethylene sorbitan monolaurate13.3Tween 40Polyoxyethylene sorbitan monopalmitate15.6Tween 60Polyoxyethylene sorbitan monostearate14.9

What is the HLB of beeswax?

So the HLB value of the emulsion set number 4 was calculated as follow: liquid paraffin = 10/20×HLB 10 = 5.0, soft paraffin = 7.059/20×HLB 7 = 2.471, beeswax = 2.941/20×HLB 12 = 1.765.

Why is HLB SLS 40?

Since SLS is more soluble in water than the oil, water is the continuous phase while the oil is the internal phase. In addition, SLS has a very high HLB value of 40 meaning it is water soluble and it prefers to form o/w emulsions.

What is HLB in citrus?

Huanglongbing (HLB) or citrus greening is the most severe citrus disease, currently devastating the citrus industry worldwide. The presumed causal bacterial agent Candidatus Liberibacter spp. affects tree health as well as fruit development, ripening and quality of citrus fruits and juice.

What is emulsification agent?

An emulsifying agent (emulsifier) is a surface-active ingredient which adsorbs at the newly formed oil–water interface during emulsion preparation, and it protects the newly formed droplets against immediate recoalescence.

How is microemulsion formed?

Three components are the basic requirement to form a microemulsion: two immiscible liquids and a surfactant. The majority of microemulsions use oil and water as immiscible liquid pairs.

Is water a wetting agent?

A wetting agent is defined as a chemical substance that increases the spreading and penetrating ability of a liquid — in this case, water — by reducing its surface tension.

What is the function of emulsifying agent?

Emulsifying Agents are the substances added to an emulsion to prevent the coalescence of the globules of the dispersed phase. They are also known as emulgents or emulsifiers. They act by reducing the interfacial tension between the two phases and forming a stable interfacial film.

Who owns Hong Leong?

FormerlyHong Leong Credit BerhadKey peopleQuek Leng Chan, Chairman Tan Kong Khoon, CEORevenueMYR 6.2 billion (2020) MYR 6.6 billion (2019)

How many branches of HLB are there in Malaysia?

ISINMYL5819OO007IndustryFinancial ServicesFounded1905HeadquartersMenara Hong Leong, No.6, Jalan Damanlela, Bukit Damansara, 50490, Kuala Lumpur, MalaysiaNumber of locations329 branches

What do you understand by emulsion?

emulsion, in physical chemistry, mixture of two or more liquids in which one is present as droplets, of microscopic or ultramicroscopic size, distributed throughout the other. … Unstable emulsions eventually separate into two liquid layers.

What is the HLB value of antifoaming agents?

The HLB value can be used to predict the surfactant properties of a molecule: < 10 : Lipid soluble (water insoluble) > 10 : Water soluble (lipid insoluble) 1.5 to 3: anti-foaming agent.

What is mean by HLB Mcq?

Hydrophilic–Lipophilic Balance Concept: The HLB concept was introduced by Griffin in 1947 to classify nonionic surfactants but has since been applied to ionic surfactants as well. … The higher the HLB number, the more hydrophilic is the surfactant. The lower the HLB number, the more lipophilic is the surfactant.

Why is emulsion white?

Emulsions tend to have a cloudy appearance because the many phase interfaces scatter light as it passes through the emulsion. Emulsions appear white when all light is scattered equally.