AMMONIUM TETRABORATE TETRAHYDRATE

AMMONIUM TETRABORATE TETRAHYDRATE - Names and Identifiers

Name	AMMONIUM TETRABORATE TETRAHYDRATE
Synonyms	Ammonium biborate tetrahydrate AMMONIUM TETRABORATE TETRAHYDRATE azane,2-hydroxy-4-[(4-hydroxy-1,3,2,4-dioxadiboretan-2-yl)oxy]-1,3,2,4-dioxadiboretane,tetrahydrate
CAS	12228-87-4
EINECS	680-466-5

AMMONIUM TETRABORATE TETRAHYDRATE - Physico-chemical Properties

Molecular Formula	B4H16N2O11
Molar Mass	263.38
Density	1.580
Melting Point	decomposes [CRC10]
Water Solubility	% anhydrous by weight (H2O): 3.75 (0°C), 9.00 (25°C), 21.2 (50°C), 52.7 (90°C) [KIR78]
Appearance	Morphological crystal
Color	colorless
PH	~8.8 ( in solution, over a wide range of concentrations)
Storage Condition	Room Temprature

AMMONIUM TETRABORATE TETRAHYDRATE - 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. S36 - Wear suitable protective clothing.
WGK Germany	1

AMMONIUM TETRABORATE TETRAHYDRATE - Production method

F-Sporji prepared ammonium tetraborate in the (NH4)2O-B2O3-H2O system at a temperature range of 90°C. Mentzel also made it when slowly crystallizing a hot mixed solution of 24g boric acid and 110g 15% NH3 · H2O in 25g of water. It is a large square crystal. Ammonium tetraborate will partially lose ammonia in the air. Therefore, its transparent crystals will quickly change color. Ammonium tetraborate can be recrystallized from hot water, but it can no longer maintain its own theoretical composition: after each recrystallization, the content of (NH4)2O will be increased and the content of water will be reduced.

Last Update：2024-04-10 22:29:15