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Encyclopedia > Ammonium persulfate
Ammonium persulfate
Image:Ammonium persulfate.jpg
General
Systematic name  ?
Other names Ammonium Peroxydisulfate
Molecular formula (NH4)2S2O8
SMILES  ?
Molar mass 228.18 g/mol
Appearance white crystals
CAS number [7727-54-0]
Properties
Density and phase  ? g/cm3, ?
Solubility in water 80 g/100 ml (25 °C)
Melting point 120 °C (393 K) (decomposes)
Boiling point  ? °C (? K)
Acidity (pKa)  ?
Basicity (pKb)  ?
Chiral rotation [α]D  ?°
Viscosity  ? cP at ? °C
Structure
Molecular shape  ?
Coordination
geometry
 ?
Crystal structure  ?
Dipole moment  ? D
Hazards
MSDS External MSDS
Main hazards  ?
NFPA 704 Health Flammability Reactivity
Flash point  ? °C
R/S statement R: ?
S: ?
RTECS number  ?
Supplementary data page
Structure and
properties
n, εr, etc.
Thermodynamic
data
Phase behaviour
Solid, liquid, gas
Spectral data UV, IR, NMR, MS
Related compounds
Other anions  ?
Other cations  ?
Related ?  ?
Related compounds  ?
Except where noted otherwise, data are given for
materials in their standard state (at 25 °C, 100 kPa)
Infobox disclaimer and references


Ammonium persulfate (NH4)2S2O8 has been prepared by H. Marshall [1] by the method used for the preparation of Potassium Persulfate. It is very soluble in cold water, a large fall of temperature accompanying solution. It is a very strong oxidizing agent and a radical initiator. It is used to etch copper on printed circuit boards as an alternative to ferric chloride solution [2]. IUPAC nomenclature is a system of naming chemical compounds and of describing the science of chemistry in general. ... A chemical formula (also called molecular formula) is a concise way of expressing information about the atoms that constitute a particular chemical compound. ... The simplified molecular input line entry specification or SMILES is a specification for unambiguously describing the structure of chemical molecules using short ASCII strings. ... Molar mass is the mass of one mole of a chemical element or chemical compound. ... CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences, mixtures and alloys. ... Density (symbol: ρ - Greek: rho) is a measure of mass per unit of volume. ... In the physical sciences, a phase is a set of states of a macroscopic physical system that have relatively uniform chemical composition and physical properties (i. ... A substance is soluble in a fluid if it dissolves in that fluid. ... Water has the chemical formula H2O, meaning that one molecule of water is composed of two hydrogen atoms and one oxygen atom. ... The melting point of a solid is the temperature at which it changes state from solid to liquid. ... The boiling point of a substance is the temperature at which it can change its state from a liquid to a gas throughout the bulk of the liquid at a given pressure. ... In chemistry and biochemistry, acid dissociation constant, the acidity constant, or the acid-ionization constant (Ka) is a specific type of equilibrium constant that indicates the extent of dissociation of hydrogen ions from an acid(I.E how well it splits H+ Ions). ... In chemistry and biochemistry, acid dissociation constant, the acidity constant, or the acid-ionization constant (Ka) is a specific type of equilibrium constant that indicates the extent of dissociation of hydrogen ions from an acid(I.E how well it splits H+ Ions). ... The specific rotation of a chemical compound [α]D is defined as the observed optical rotation (a) when light of 589 nanometer wavelength is passed through a sample with a sample path (l) of 0. ... The pitch drop experiment at the University of Queensland. ... The poise (P) is the cgs unit of viscosity, 1 P = 1 g·cm-1·s-1 The SI analog is 1 pascal second (Pa·s) = 1 kg·m-1·s-1 = 10 P. It is named after Jean Louis Marie Poiseuille. ... four sp³ orbitals three sp² orbitals In chemistry, hybridisation or hybridization (see spelling differences) is the mixing of atomic orbitals belonging to a same electron shell to form new orbitals suitable for the qualitative description of atomic bonding properties. ... The coordination geometry of an atom is the geometrical pattern formed by its neighbors in a molecule or a crystal. ... Rose des Sables (Sand Rose), formed of gypsum crystals In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. ... The Earths magnetic field, which is approximately a dipole. ... The debye (symbol: D) is a non-SI and non-CGS unit of electrical dipole moment. ... A material safety data sheet or MSDS is a form containing data regarding the properties of a particular substance. ... Worker safety and health is the prevention and reduction of the number of occupational safety and health hazards at the places of employment, providing safe and healthful working conditions. ... NFPA 704 is a standard maintained by the U.S. National Fire Protection Association. ... Image File history File links File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Image File history File links File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Image File history File links File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... The flash point of a flammable liquid is the lowest temperature at which it can form an ignitable mixture with air. ... Risk and Safety Statements, also known as R/S statements, R/S numbers, R/S phrases, and R/S sentences, is a system of hazard codes and phrases for labeling dangerous chemicals and compounds. ... R-phrases are defined in Annex III of European Union Directive 67/548/EEC: Nature of special risks attributed to dangerous substances and preparations. ... S-phrases are defined in Annex IV of European Union Directive 67/548/EEC: Safety advice concerning dangerous substances and preparations. ... RTECS, also known as Registry of Toxic Effects of Chemical Substances, is a database of toxicity information compiled from the open scientific literature that is available for charge. ... The refractive index (or index of refraction) of a material is the factor by which the phase velocity of electromagnetic radiation is slowed in that material, relative to its velocity in a vacuum. ... The dielectric constant εr (represented as or K in some cases) is defined as the ratio: where εs is the static permittivity of the material in question, and ε0 is the vacuum permittivity. ... Ultraviolet-Visible Spectroscopy or Ultraviolet-Visible Spectrophotometry (UV/ VIS) involves the spectroscopy of photons (spectrophotometry). ... IR spectrum of a thin film of liquid ethanol. ... Nuclear Magnetic Resonance Spectroscopy most commonly known as NMR Spectroscopy is the name given to the technique which exploits the magnetic properties of nuclei. ... It has been suggested that Mass spectrum be merged into this article or section. ... // An ion is an atom, group of atoms, or subatomic particle with a net electric charge. ... // An ion is an atom, group of atoms, or subatomic particle with a net electric charge. ... A question mark is a punctuation mark. ... In chemistry, the standard state of a material is its state at 1 bar (100 kilopascals) and 25 degrees Celsius (298. ... European Union Chemical hazard symbol for oxidizing agents Dangerous goods label for oxidising agents An oxidizing agent is a compound that oxidizes another substance in electrochemistry or redox chemical reactions. ... In chemistry, radical initiators are substances that can produce radical species under mild conditions and promote radical reactions. ... Close-up photo of one side of a motherboard PCB, showing conductive traces, vias and solder points for through-hole components on the opposite side. ... Ferric chloride (FeCl3) is an iron-based salt. ...


Suppliers/Manufacturers

References


  Results from FactBites:
 
PCB:Etchants - K9spud (988 words)
We used the ammonium persulfate with this $40 Etching Tank and our boards were etched in just a few minutes with excellent results.
Ammonium persulfate seems to become saturated much faster than Ferric Chloride -- I can only re-use the same batch a few times before it becomes ineffective.
Ammonium persulfate doesn't keep as well as ferric chloride, so you should try to use it up as soon as you've made it.
Method of treating a battery electrode with persulfate - Patent 5149606 (6255 words)
The method of claim 1, wherein the persulfate salt is selected from a group consisting of sodium persulfate, potassium persulfate, and ammonium persulfate.
The persulfate solution may be prepared by dissolving a persulfate salt, such as sodium persulfate, ammonium persulfate, lithium persulfate, or potassium persulfate, in an aqueous solution of a metal hydroxide such as potassium hydroxide or sodium hydroxide.
The concentration of the persulfate, the stabilizing sulfate salt, and the base hydroxide compound may vary widely depending on the reaction conditions, and may be determined for specific applications through experimentation.
  More results at FactBites »


 
 

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