Tannic Acid CAS 1401-55-4

1. Tannic acid CAS 1401-55-4 is widely utilized as an additive in biopolymer-based films for food preservation, where its antioxidant and antimicrobial properties enhance the shelf life of perishables like apples, bananas, and tomatoes . It also finds application in sustainable food packaging as a crosslinking agent to improve the mechanical and barrier properties of protein and polysaccharide-based films .
2. Tannic acid is employed as a key agent in leather tanning to enhance the durability and water resistance of leather goods, and as a reagent in environmental applications for water treatment to remove heavy metals and pollutants . In analytical chemistry, Tannic acid serves as a reagent for the precipitation and determination of metals like aluminum, gallium, and zirconium .
3. Applications of Tannic acid also extend to the pharmaceutical industry as a stabilizer for active ingredients and as an astringent in topical treatments for cold sores, poison ivy, and diaper rash, as well as historically for managing diarrhea and bleeding . In cosmetics, it is incorporated into skincare products for its anti-inflammatory and astringent benefits, particularly for treating acne and oily skin .

1. Store Tannic acid CAS 1401-55-4 in a tightly sealed container in a cool, dry, and well-ventilated place, protected from light and air, as it is sensitive to both and its color darkens upon exposure . Recommended storage conditions include room temperature (15-30°C) ; however, long-term stability for powdered forms can be maintained at -20°C for up to 3 years .
2. Keep Tannic acid away from strong oxidizing agents and strong bases due to incompatibility, and avoid contact with iron and other heavy metals, as Tannic acid forms colored complexes . It is also sensitive to moisture and should be kept in a dry environment .
3. Always use appropriate personal protective equipment (PPE), including protective gloves and eye protection (tightly fitting safety goggles), when handling Tannic acid to avoid skin, eye, and respiratory contact . Ensure adequate ventilation in the handling area and avoid dust formation .

1. Immediately contain the Tannic acid CAS 1401-55-4 spill using inert, non-combustible absorbent material (e.g., sand) and deposit the collected material in a sealed, labeled chemical waste container . Avoid dust generation and use non-sparking tools for cleanup .
2. Prevent Tannic acid from entering drains or waterways, as discharge into the environment must be avoided . After material pickup, wash the spill site thoroughly .
3. Personnel Tannic acid must wear suitable PPE, including chemical-resistant gloves and eye protection, during cleanup . Dispose of Tannic acid and all contaminated materials in accordance with local, state, and federal environmental regulations; controlled incineration is an option for disposal .

1. Tannic acid CAS 1401-55-4 is classified with a GHS signal word "Warning" and may be harmful if swallowed (H303, Category 5), with an oral LD50 of 2260 mg/kg in rats . Tannic acid can cause nausea and abdominal pain upon acute exposure .
2. Tannic acid is a combustible solid with a flash point of approximately 198-199°C and an autoignition temperature of 526-527°C . When heated to decomposition, it may emit toxic fumes . Tannic acid is considered stable but incompatible with strong oxidizing agents and bases .
3. Tannic acid is classified as an IARC Group 3 carcinogen (not classifiable as to its carcinogenicity to humans) . While it has low acute toxicity, large quantities may cause vomiting, abdominal pain, and diarrhea, and it is for R&D use only, not for medicinal, household, or other use . Always consult the specific Safety Data Sheet (SDS) for complete hazard, first-aid, and handling information .