What is the formula of saponification value?
Saponification Value = (A – B) x N x 56.1 W This method is used to determine the total acid content, both free and combined, of tall oil. (Acid number only measures the free acid). The combined acids are primarily esters formed by reaction with the neutral components present in the original tall oil.
What is meant by saponification value of oil?
The saponification value is defined as “the number of milligrams of KOH needed to neutralize the fatty acids obtained by complete hydrolysis of 1gram of an oil sample.”
Why do we determine saponification value?
The saponification number indicates how much potassium hydroxide is needed to saponify 1g fat. This information can be used to calculate how many acids (esters and free acids) are contained in a fat or oil. The greater the number of saponification, the more short- and medium-chain fatty acids the fat contains.
How do you use saponification value?
Divide the amount of lye by 0.3 and then subtract the amount of lye from the result.
- (Amount of Fat) × (Saponification Value of the Fat) = (Amount of Lye)
- (Amount of Lye) ÷ 0.3 = (Total Weight of Lye Water Solution)
- (Total Weight of Lye Water Solution) − (Amount of Lye) = (Amount of Water)
What is the unit of saponification value?
What is the unit of saponification value? Saponification value is expressed by potassium hydroxide in mg required to saponify one (1) gram of fat.
What is the importance of saponification value of an oil sample?
The higher the saponification value, the lower the fatty acids average length, the lighter the mean molecular weight of triglycerides and vice versa. Practically, fats or oils with high saponification value (such as coconut and palm oil) are more suitable for soap making.
What is the range of saponification value?
187.3 to 199.0
Unsaponifiable matter ranges from 0.1 to 1.6, saponification number ranges from 187.3 to 199.0, iodine value is 90.0–104.8, specific gravity is 0.876–0.932, and the refractive index is 1.464–1.480 (Alpaslan and Hayta, 2006).
Why HCl is used in saponification?
Answer. the answer to your question is that HCl does NOT interact with ethyl acetate directly, but gets ridof all the excess, pesky OH-‘sthat are driving the reaction.
Which oil is best for saponification?
Saponification Chart
| Lipids | SAP | NAOH (oz.) |
|---|---|---|
| Amla Oil | 150 – 350 | 0.178 |
| Apple Seed Oil | 185 – 200 | 0.138 |
| Apricot Kernel Butter | 130 – 145 | 0.098 |
| Apricot Kernel Oil | 185 – 195 | 0.135 |
Why is NaOH used in saponification?
NaOH is widely used in the manufacture of solid soap because it is not soluble in water [22]. The use of the amount of NaOH that is lacking in the saponification reaction will cause the formation of residues / residual fatty acids (oil) after the reaction.
Why saponification value of oil is important?
Which alkali is used in saponification?
potassium hydroxide
The salts of fatty acids are known as soap. The amount of potassium hydroxide required in the hydrolysis indicates the saponification value of fat. It can be simply described as the amount of alkali (e.g., potassium hydroxide) required to saponify 1 g of fat.
Why is NaCl added in saponification?
The fatty acids are soluble in the alkaline solution used for hydrolysis and that’s why, salt is added so that sodium salt of fatty acid is formed and it gets precipitated out. Therefore, sodium chloride is used in the soap industry for soap’s precipitation.
What does stearic acid do in soap?
Stearic acid is an emulsifier, emollient, and lubricant that can soften skin and help to keep products from separating. Stearic acid is used in hundreds of personal care products, including moisturizer, sunscreen, makeup, soap, and baby lotion.
Why is lauric acid used in soap?
Lauric acid is a saturated fat and a medium-chain fatty acid, made up of a twelve atom carbon chain. What does this mean to you? Oils high in lauric acid will make soap that gets hard and offers mounds of fluffy bubbles for your bathing pleasure. It also creates a super cleansing bar.
Which oils are high in stearic acid?
Stearic acid makes for a hard bar with stable, creamy lather. The oil highest in stearic acid is surprisingly, soy wax, boasting a whopping 87%! All butters are high in stearic, as well. Mango, cocoa, shea, kokum, sal, illipe, you name it, is high in stearic acid.
Why is nacl used in saponification?
Why NaOH is used in saponification?
What is another name for stearic acid?
Stearic acid, another name for octadecanoic acid CH3(CH2)16COOH, is one of the most common fatty acids. It exists as a glycerol ester in most animal and plant fats (Beare-Rogers, Dieffenbacher, & Holm, 2001).
What is the pH of stearic acid?
5.5
Since the pH of stearic acid is 5.5 and the melting point is 57.23°C, and the inlet temperature of the fluidized bed granulator could be as high as 70°C, a preliminary study was initiated to determine the tolerance of L.
Why do we add ethanol in saponification?
Ethanol increases the catalyst solubility in the oil-ethyl ester phase, thus accelerating the saponification reaction.
What oils are high in stearic acid?
What is the color of stearic acid?
White solid
Stearic acid
| Names | |
|---|---|
| Appearance | White solid |
| Odor | Pungent, oily |
| Density | 0.9408 g/cm3 (20 °C) 0.847 g/cm3 (70 °C) |
| Melting point | 69.3 °C (156.7 °F; 342.4 K) |
What is the main function of stearic acid?
Stearic Acid Uses
Stearic acid is an emulsifier, emollient, and lubricant that can soften skin and help to keep products from separating. Stearic acid is used in hundreds of personal care products, including moisturizer, sunscreen, makeup, soap, and baby lotion.