1336-21-6

Product Name: Ammonium hydroxide

Formula: H5NO

Synonyms: Ammonia aqueous;Ammonia Solution;Ammonia water;Ammonium hydroxide solution;Ammonium hydroxide solution, Ammonia water

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CHEMICAL AND PHYSICAL PROPERTIES SAFETY INFORMATION COMPUTED DESCRIPTORS PRODUCT INTRODUCTION RELATED SUPPLIERS

CHEMICAL AND PHYSICAL PROPERTIES

Physical Description	Ammonium hydroxide appears as a colorless aqueous solution. Concentration of ammonia ranges up to approximately 30%. Ammonia vapors (which arise from the solution) irritate the eyes.
Color/Form	Colorless liquid
Odor	Intense, pungent, suffocating odor
Taste	Acrid taste
Boiling Point	38 °C (25%)
Melting Point	-58 °C (25%)
Solubility	Exists only in solution
Density	About 0.90 @ 25 °C/25 °C
Vapor Density	Relative vapor density (air = 1): 0.6
Vapor Pressure	2160 mm Hg @ 25 °C
Decomposition	When heated to decomposition it emits ammonia and nitroxides.
Corrosivity	Dissolves copper, zinc
pH	pH= 11.6 (1.0 N solution); 11.1 (0.1 N solution); 10.6 (0.01 N solution)
Odor Threshold	Odor Threshold Low: 50.0 [ppm] [HSDB] Odor threshold from CHRIS
Dissociation Constants	pKb= 4.767, Kb= 1.710X10-5 at 20 °C; pKb= 4.751, Kb= 1.774X10-5 at 25 °C; pKb= 4.740, Kb= 1.820X10-5 at 30 °C
Other Experimental Properties	Reaction with sulfuric acid or other strong mineral acids is exothermic; mixture becomes boiling hot
Chemical Classes	Other Classes -> Bases

SAFETY INFORMATION

Signal word	Danger
Pictogram(s)	Corrosion Corrosives GHS05 Exclamation Mark Irritant GHS07 Environment GHS09
GHS Hazard Statements	H314:Skin corrosion/irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation H410:Hazardous to the aquatic environment, long-term hazard
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P271:Use only outdoors or in a well-ventilated area. P273:Avoid release to the environment. P280:Wear protective gloves/protective clothing/eye protection/face protection. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

COMPUTED DESCRIPTORS

Molecular Weight	35.046 g/mol
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	1
Rotatable Bond Count	0
Exact Mass	35.037113783 g/mol
Monoisotopic Mass	35.037113783 g/mol
Topological Polar Surface Area	2 Å²
Heavy Atom Count	2
Formal Charge	0
Complexity	0
Isotope Atom Count	0
Defined Atom Stereocenter Count	0
Undefined Atom Stereocenter Count	0
Defined Bond Stereocenter Count	0
Undefined Bond Stereocenter Count	0
Covalently-Bonded Unit Count	2
Compound Is Canonicalized	Yes

PRODUCT INTRODUCTION

description

Ammonium hydroxide appears as a colorless aqueous solution. Concentration of ammonia ranges up to approximately 30%. Ammonia vapors (which arise from the solution) irritate the eyes.