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Aluminum diacetate hydroxide CAS NO.: 142-03-0 Metric-Ton Scale Supply

September 30, 2026

Product Overview:

Aluminum diacetate hydroxide (CAS 142-03-0) is an aluminum-based organic compound that appears as a white, amorphous powder with a slight acetic acid odor and mild hygroscopicity. It belongs to the basic aluminum acetates, commonly known by aliases such as basic aluminum acetate, aluminum subacetate, and aluminum diacetate. It is widely used in textiles, pharmaceuticals, cosmetics, and water treatment.

Product information:

Product Name	Aluminum diacetate hydroxide
Synonyms	ALUMINIUM ACETATE, BASIC;ALUMINIUM ACETATE, SOLUBLE;ALUMINUM SUBACETATE;ALUMINUM SUBACETATE BASIC;ALUMINUM DIACETATE HYDROXIDE;ALUMINUM DIACETATE MONOBASIC;ALUMINUM ACETATE, BASIC
CAS No.	142-03-0
Molecular Formula	C4H7AlO5
Molecular Weight	162.08
Assay (CH₃COOH), %	≥ 50%
Appearance	white powder

Frequently Asked Questions (FAQ)

Q1: What special precautions should be taken during transportation?

It is generally not classified as a dangerous good, with no special UN number or transport class restrictions. During transport, prevent packaging damage and moisture exposure. For routine storage, the core requirements are sealed, dry, and cool conditions. It is recommended to store in closed containers in a cool, dry, well-ventilated warehouse, away from ignition sources and heat.

Q2: What are the packaging and loading precautions for export ocean shipping?

Use an inner PE moisture-barrier bag (25 woven bags or fiberboard drums). Do not stow in the same hold as acid-containing cargo; keep hold temperature ≤40°C and away from heat sources.

Q3: Incompatibilities — what substances should it not coexist with?

Strong oxidizers (potassium permanganate, nitrates, etc.): may react violently

Strong acids: decompose to release acetic acid gas

Strong bases: form aluminum hydroxide precipitate

Avoid prolonged contact with reducing agents and alkaloid solutions

Q4: What factors affect its stability?

It is stable at room temperature and pressure. However, note: after drying at 110°C it becomes insoluble; at high temperatures it decomposes to Al₂O₃ + acetic acid; upon moisture absorption it slowly hydrolyzes, with intensified acetic odor and increased alkalinity. Storage should avoid moisture and high temperatures.

Q5: How can you tell if the product has deteriorated?

Caking, yellowing, a noticeably pungent acidic odor (indicating hydrolysis), or a significant decrease in water solubility — any one of these indicates quality degradation. The product should be re-tested and confirmed acceptable before use.

Q6: What role does it play in water treatment?

In water treatment, aluminum diacetate hydroxide can serve as a water purifying agent. The aluminum hydroxide precipitate produced by hydrolysis can effectively adsorb suspended solids and organic matter in water, remove impurities such as fluoride, and improve water clarity and cleanliness.

Application Cases

Application Case 1: Textile Printing and Dyeing — Preventing Dye “Bleeding”

Q: What specific problem does aluminum diacetate hydroxide solve in textile printing and dyeing?

A: A classic application is preventing dyes from “crawling” along fibers during printing, which causes blurred patterns. Taking acetate fabric as an example, the fabric is first impregnated with an aluminum diacetate hydroxide solution (e.g., 15 g/L, treated at 75°C) and dried before printing, yielding patterns with sharp, well-defined edges. The mechanism is that aluminum ions form a barrier layer on the fiber surface, inhibiting dye diffusion into non-printed areas.

Application Case 2: Natural Dyeing — Enhancing Color Depth and Vibrancy

Q: How effective is it as a mordant in natural dyeing?

A: Taking cotton dyed with gromwell (Lithospermum) root dye as an example, when aluminum diacetate hydroxide is used as a pre-mordant, the dyed fabric achieves a K/S value (color depth indicator) of over 35, far higher than that of unmordanted or post-mordanted fabric (post-mordant K/S value only about 3). Meanwhile, the dyed fabric exhibits a more vivid purple-red hue (increased a* value, decreased b* value), indicating that it effectively promotes binding between the dye and the fiber as an aluminum mordant.

Application Case 3: Medicine — Non-Antibiotic Alternative for Treating Otitis Externa in Dogs

Q: Is there clinical data support in the veterinary field?

A: Yes. A randomized clinical trial involving 142 dogs with otitis externa showed that treatment with 2% aluminum diacetate hydroxide + 0.1% betamethasone ear drops for 10 days achieved a cure rate of 65%, meeting the non-inferiority criterion compared with the standard antibiotic/hormone combination (Surolan, cure rate 59%). This provides a non-antibiotic option for managing ear infections in the context of antibiotic resistance.

Application Case 4: Pharmaceutical Preparations — Burow’s Solution (Astringent Wet Dressings)

Q: What is the most typical product form in human medicine?

A: It is Burow’s solution, typically a 13% aqueous solution of aluminum diacetate hydroxide. It is used as a wet dressing to relieve itching and exudation caused by poison ivy/poison oak dermatitis, insect bites, and eczema. Its mechanism of action is that aluminum ions cross-link and precipitate epidermal proteins, forming a protective layer and constricting blood vessels, thereby reducing exudation and drying the wound surface. In the U.S. market, it is sold under trade names such as Domeboro powder and Pedi-Boro soaking powder.

Application Case 5: Chemical Intermediate — Preparation of Silica-Alumina Composite Sol

Q: As an intermediate, what products can it be extended into?

A: An aqueous solution of aluminum diacetate hydroxide can react with acidic silica sol under stirring to produce a transparent silica-alumina composite sol (SiO₂:Al₂O₃ mass ratio adjustable, e.g., 40:60). This composite sol has a positive ζ potential over the pH range of 3–9, a particle size of approximately 22 nm, and can remain stable at 20°C for over a month without sedimentation or gelation, making it suitable for high-end applications such as catalysis and coatings.

Safety and Storage

Safety: Not dangerous goods. Keep away from heat sources and prolonged high-temperature exposure.
Storage: Keep sealed, stored in dry and cool place; keep at room temperature.