Tannic acid, is an organic compound with the chemical formula C76H52O46. It is a yellow or brownish yellow powder, and its aqueous solution turns blue black when it meets an iron salt solution. In industry, tannic acid is widely used in tanning leather and manufacturing blue ink. People chemically treat pig and cow hides with tannic acid, which can coagulate the soluble proteins in the hides. So, the raw leather that would have smelled and rotted in a few days turned into beautiful, clean, flexible, and durable leather. This tanning process is called leather tanning.
Usage and dosage: For external use, apply locally, 2-3 times a day. In the skincare industry, tannic acid is often used in acne removing skincare products, fully utilizing the astringent effect of tannic acid to achieve the goal of tightening the skin and removing acne.
We have many high-quality factories with deep cooperation, which can provide you with high quality products and competitive prices. And we can also give discounts for bulk purchases.And we cooperate with many professional freight forwarding companies, can deliver products safely and smoothly to your hands. Delivery time is about 3-20 days after confirmation of payment.
Analysis | Unit | Result | |||||
Physical Control | |||||||
Purity(Tannic acid on Dry Basis) | >=90% | 90.50% | |||||
Appearance | Light brown powder | Conform | |||||
Odor | Proctically odourless | Conform | |||||
Taste | Neutral / Slight astringent taste | Conform | |||||
Solubility | Very soluble in water. freely soluble in acetone, in alcohol. | Conform | |||||
Loss On Drying | <=9.0% | 8.10% | |||||
Residue On Ignition | <=1.0% | 0.80% | |||||
Arsenic | <=3.0ppm | Conform | |||||
Lead | <=2.0ppm | Conform | |||||
Heavy Metal (Pb) | <=20ppm | Conform | |||||
Gums, Dextrin Test | No turbidity | Conform | |||||
Resins Test | No turbidity | Conform | |||||
Gallic Acid | <=4.0% | 2.50% |
1. Are you a factory or a trading company?
We are a compnay integrating industry and trade,providing one-stop service.OEM could be accepted.
2. Do you provide samples? Is it free or extra?
Free samples.The sample's freight fee need to be paid by your side.
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ISO 9001:2008 certification to ensure quality.
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