五硼酸铵八水合物

Description

ammonium pentaborate octahydrate · CAS 12007-89-5 · B5H4NO8. UNII E9ND2KN062. Density: 1.57 @ 20°C.

Identification

CAS Registry Number	12007-89-5
PubChem CID	131634794
Molecular formula	B5H4NO8
IUPAC name	azanium (7-oxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonan-3-yl)oxy-oxoborane
UNII (FDA)	E9ND2KN062

Computed Descriptors

Molecular Weight	200.1
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	8
Rotatable Bond Count	1
Exact Mass	200.0438486
Monoisotopic Mass	201.0402169
Topological Polar Surface Area	96.5
Heavy Atom Count	14
Formal Charge	0
Complexity	181

Physical & Chemical Properties

Density	1.57 @ 20°C

Physical description & handling notes

• Ammonium pentaborate is an odorless white solid. Sinks and mixes slowly with water. (USCG, 1999)
• Odorless white solid; [CAMEO] Slightly water soluble; [MSDSonline]
• Colorless solid; specific gravity: 1.57 at 20 °C; solubility in water: 4% at 0 °C; 7.07% at 20 °C; 14.4% at 50 °C /Ammonium pentaborate tetrahydrate/
• 1.58 at 59 °F (USCG, 1999) - Denser than water; will sink
• Crystals or powder; soluble in water /Ammonium pentaborate octahydrate/
• Molecular weight: 263.377; tetragonal crystals; soluble in water; insoluble in ethanol /Ammonium pentaborate tetrahydrate/

Regulatory Status

GHS notification summary	53.8% (21 / 39)

GHS Hazard Classification

GHS notification summary	53.8% (21 / 39)
Reported hazard statements	H302 (10.3%), H315 (12.8%), H319 (12.8%), H361 (30.8%), H335, H360, H370

Documented Uses

• Used in chemical production and atomic submarines; [Hawley]
• Intermediate for boron chemicals; as a power-level control in atomic submarines.
• Boric acid, borates and perborates have been used as mild antiseptics or bacteriostats in eyewashes, mouthwashes, burn dressings, and diaper rash powders; however, the effectiveness of boric acid has largely been discredited. /Borates/
• Not Known or Reasonably Ascertainable
• Ammonium boron oxide ((NH4)B5O8): ACTIVE

Synonyms

Ammonium pentaborat; Ammonium borate (NH4B5O8); E9ND2KN062; Boric acid (HB5O8), ammonium salt; Ammonium pentaborate ((NH4)B5O8); RefChem:112192; DTXSID90894253; 234-521-1; 12007-89-5; Ammonium boron oxide ((NH4)B5O8); Ammonium pentaborate; Diammonium decaborate; UNII-E9ND2KN062; CCRIS 8891; HSDB 1425; EINECS 234-521-1

Frequently Asked Questions

What are the CAS number and molecular formula of ammonium pentaborate octahydrate?

CAS 12007-89-5; molecular formula B5H4NO8; molecular weight — g/mol.

What other names is ammonium pentaborate octahydrate known by?

Ammonium pentaborat, Ammonium borate (NH4B5O8), E9ND2KN062, Boric acid (HB5O8), ammonium salt, Ammonium pentaborate ((NH4)B5O8), RefChem:112192.

Is ammonium pentaborate octahydrate classified as hazardous?

53.8% of GHS notifications report no hazard classification (21 of 39).

What are the key physical properties of ammonium pentaborate octahydrate?

Density: 1.57 @ 20°C.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.