Aluminum diacetate hydroxide/cas142-03-0/ white powder/Mordants, dyeing agents

Used as a mordant, dyeing agent, astringent, and disinfectant; also used in embalming solutions.

**Bicarbonate aluminum acetate** (also known as basic aluminum acetate) is a chemical substance. Its standard chemical name is **dihydrogen acetate aluminum hydroxide**, with the molecular formula of \( \text{C}_4\text{H}_7\text{AlO}_5 \). It is commonly used in industry and analytical chemistry as a **mordant**, **preservative**, and **astringent**.

1. Basic Information
CAS Number: 142-03-0
Molecular Weight: 162.08 (anhydrous form); Partial hydrate molecular weight is 198.08.
EINECS Number: 205-518-2

2. Physical and Chemical Properties
Appearance: White amorphous powder, with a slight acetone-like odor. Solubility:
Key characteristics: It is soluble in water when freshly prepared, but becomes almost insoluble in water after drying (e.g. when heated to 110℃).
It is soluble in inorganic acids (such as hydrochloric acid) and alkaline solutions. Stability:
It has a slight hygroscopic property. When left for a long time or exposed to heat, it will gradually lose acetic acid and its alkalinity will increase.
Its aqueous solution is acidic towards litmus and will gradually become cloudy and form a gel-like substance (usually urea or thiourea can be added as stabilizers).
3. Main Applications
Industrial field: Used as a **mordant** in the dyeing industry, as well as a waterproof and fireproof treatment agent for fibers.
Pharmaceuticals/Personal Care Products: Has astringent and disinfectant properties, can be used as an **astringent** and **disinfectant** (note the safety assessment for modern medical use).
Others: Also used in embalming solutions for corpses, and as analytical chemical reagents.
4. Safety and Storage
Hazard: Irritating to the eyes, respiratory system and skin. Adequate protective clothing (such as gloves and goggles) should be worn in case of extensive contact.
Storage conditions: Store in a sealed container to prevent moisture. Keep in a cool, dry and well-ventilated place.
Environmental impact: Generally, it has little harm to water bodies. However, large-scale discharge into the environment may still have an impact. Compliance with local environmental protection regulations is required.