Secondary names

Ammonium hydrogen carbonate; azanium;hydrogen carbonate; Carbonic acid, ammonium salt (1:1); Bicarbonate of ammonia; Monoammonium carbonate; Acid ammonium carbonate; (NH4)HCO3; (NH4+)(HCO3)-; NH5CO3; CH5NO3

CAS number

1066-33-7

4.0

	Formula	Name	Family	Number min-max	Mole fraction	Isotope mole fraction	State	Relevance
	$NH_4^+$	Ammonium ion	molecule	1	0.5	1	constituent cation	main
	$HOCOO^-$	Bicarbonate ion	molecule	1	0.5	1	constituent anion	main

Chemical functions

	Function	Number
	$H_4 >\mid N^+$	1

Chemical bonds

	Bond	Number
	$>\mid N^+ \cdot O^{-}-$	1
	$-O \dots H-$	2
	$\geq N^+-H$	4
	$\eqslantgtr C-O-$	1
	$-O-H$	1
	$>C=O$	1
	$\eqslantgtr C-O^-$	1

Class

acid salts (05)

Type

simple acid salts (05.01)

Group

bicarbonate or carbonate (05.01.01)

Phase type

crystalline

Crystal system

orthorhombic

Crystal class

dipyramidal

Crystal class symbol

mmm (D2h)

Crystal spacegroup

Pccn

Refringence type

biaxial

Refringence sign

negative

Birefringence

0.132

Refraction index $n_{\alpha}$

1.422

Refraction index $n_{\beta}$

1.536

Refraction index $n_{\gamma}$

1.554

Dispersion V

weak

Pure color

colorless

Color

colorless, white, light grey

Diaphaneity

transparent to translucent

Links

• Wikipedia: Ammonium bicarbonate
• PubChem: Ammonium bicarbonate