Question:
The HLB number of soy lecithin is :
The HLB number of soy lecithin is :
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- HLB $<$ 6: Oil-soluble, stabilizes Water-in-Oil (W/O) emulsions.
- HLB $>$ 8: Water-soluble, stabilizes Oil-in-Water (O/W) emulsions.
Standard soy lecithin is lipophilic and has an HLB value of 3.8.
- HLB $>$ 8: Water-soluble, stabilizes Oil-in-Water (O/W) emulsions.
Standard soy lecithin is lipophilic and has an HLB value of 3.8.
Updated On: Jul 21, 2026
- 3.0
- 3.8
- 7.0
- 11.5
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
The Hydrophilic-Lipophilic Balance (HLB) is an empirical scale used to measure the degree to which an emulsifier is hydrophilic (water-loving) or lipophilic (oil-loving).
HLB values range from 0 to 20:
- Low HLB values (\(< 6\)) indicate lipophilic emulsifiers, suitable for oil-in-water (W/O) emulsions.
- High HLB values (\(> 10\)) indicate hydrophilic emulsifiers, suitable for water-in-oil (O/W) emulsions.
Detailed Explanation:
Soy lecithin is a natural mixture of polar phospholipids (including phosphatidylcholine, phosphatidylethanolamine, and phosphatidylinositol) and neutral triglycerides.
Standard, unmodified commercial soy lecithin is highly lipophilic.
Its HLB value is typically between 3.5 and 4.0.
The value of 3.8 represents standard crude or fluid soy lecithin.
This makes it highly effective for stabilizing water-in-oil (W/O) systems, such as margarine, spreads, and chocolate, where it prevents fat bloom and controls viscosity.
Chemically modified or enzymatically hydrolyzed lecithins can have higher HLB values (ranging from 7 to 12), but unmodified soy lecithin is characterized by an HLB of 3.8.
Step 2: Final Answer:
The HLB number of unmodified soy lecithin is 3.8.
The Hydrophilic-Lipophilic Balance (HLB) is an empirical scale used to measure the degree to which an emulsifier is hydrophilic (water-loving) or lipophilic (oil-loving).
HLB values range from 0 to 20:
- Low HLB values (\(< 6\)) indicate lipophilic emulsifiers, suitable for oil-in-water (W/O) emulsions.
- High HLB values (\(> 10\)) indicate hydrophilic emulsifiers, suitable for water-in-oil (O/W) emulsions.
Detailed Explanation:
Soy lecithin is a natural mixture of polar phospholipids (including phosphatidylcholine, phosphatidylethanolamine, and phosphatidylinositol) and neutral triglycerides.
Standard, unmodified commercial soy lecithin is highly lipophilic.
Its HLB value is typically between 3.5 and 4.0.
The value of 3.8 represents standard crude or fluid soy lecithin.
This makes it highly effective for stabilizing water-in-oil (W/O) systems, such as margarine, spreads, and chocolate, where it prevents fat bloom and controls viscosity.
Chemically modified or enzymatically hydrolyzed lecithins can have higher HLB values (ranging from 7 to 12), but unmodified soy lecithin is characterized by an HLB of 3.8.
Step 2: Final Answer:
The HLB number of unmodified soy lecithin is 3.8.
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