1303-52-2

1303-52-2 - Names and Identifiers

Name	Gold(III) hydroxide
Synonyms	Gold Hydroxide GOLD HYDROXIDE gold trihydrate Gold trihydroxide gold(1+) hydroxide Gold(III) hydroxide GOLD(III) HYDROXIDE goldhydroxide(au(oh)3)
CAS	1303-52-2
EINECS	215-120-0
InChI	InChI=1/Au.H2O/h;1H2/q+1;/p-1

1303-52-2 - Physico-chemical Properties

Molecular Formula	AuH3O3
Molar Mass	247.99
Melting Point	decomposes at ~100℃ [LID94]
Water Solubility	Insoluble in water.
Appearance	Powder
Solubility Product Constant(Ksp)	pKsp: 45.26
Merck	14,4523
Storage Condition	Room Temprature
Stability	Stability May decompose upon exposure to light. Incompatible with strong oxidizing agents.
Sensitive	Light Sensitive
MDL	MFCD00046173

1303-52-2 - Risk and Safety

Hazard Symbols	Xi - Irritant
Risk Codes	36/37/38 - Irritating to eyes, respiratory system and skin.
Safety Description	S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S37/39 - Wear suitable gloves and eye/face protection
WGK Germany	3
TSCA	Yes

1303-52-2 - Reference Information

EPA chemical information

Information provided by: ofmpub.epa.gov (external link)

Overview

Gold hydroxide usually refers to the yellow-brown solid precipitate generated by the reaction of a solution containing Au3 (such as a gold trichloride solution) and alkali (such as sodium hydroxide), Insoluble in water, belonging to amphoteric hydroxides, soluble in most acids, dissolve in excess strong alkali solution to form complex hydroxide ([Au(OH)4]-ion). Decompose to generate gold trioxide when it is slightly heated. Heat to 140~150 ℃ and dehydrate to become gold oxide. It is divided into gold and oxygen at 250 ℃. It is easy to reduce to metal gold and is used for gold plating, ceramic coloring, etc. Under phosphorus pentoxide drying, gold (III) hydroxide produces AuO(OH). 140 ℃ loses water to obtain digold trioxide.

Last Update：2024-04-10 22:29:15