MG Chemicals 410-1KG — Ammonium Persulphate PCB Etchant, 1kg Crystals, Case of 6MG Chemicals 410-1KG (SKU: 410-1KG) is an ammonium persulphate copper etchant in crystal form — a clean, transparent alternative to traditional ferric chloride for PCB etching. One kilogram of ammonium persulphate crystals mixed with water produces four liters of etching solution. The transparent solution allows visual inspection of the etching process as it progresses, unlike the opaque brown ferric chloride solution. Non-staining and compatible with tin etch resist. CARB compliant. Sold in cases of 6 (1kg per container).Key Specifications Specification Value Part Number / SKU 410-1KG Chemical Ammonium Persulphate (Ammonium Persulfate) Form Crystals Net Weight per Container 1 kg (2.2 lbs) Case Quantity 6 containers per case Solution Yield 4 liters of etching solution per 1kg Solution Appearance Transparent (allows visual process inspection) Etch Resist Compatibility Compatible with tin etch resist Staining Non-staining Compliance CARB compliant Brand MG Chemicals Key Features Ferric chloride alternative — produces a cleaner copper etchant solution without the mess and staining of ferric chloride Transparent solution — allows visual inspection of the etching process to monitor progress and endpoint Non-staining — does not permanently stain skin, clothing, or work surfaces the way ferric chloride does Tin resist compatible — suitable for use with tin etch resist in PCB fabrication workflows High yield — 1kg produces 4 liters of ready-to-use etching solution Frequently Asked QuestionsHow does ammonium persulphate compare to ferric chloride for PCB etching?Ammonium persulphate offers several practical advantages over ferric chloride: the solution is transparent (allowing you to see the board during etching), it is non-staining (ferric chloride permanently stains skin and surfaces), and it produces a cleaner etch. The main trade-off is that ammonium persulphate solution has a shorter working life than ferric chloride and works best when heated (typically 40–50°C). Ferric chloride works at room temperature but is messier and harder to dispose of.How do I mix the 410 crystals into etching solution?Dissolve 1kg of MG Chemicals 410 ammonium persulphate crystals in water to make 4 liters of etching solution. Always add crystals to water (not water to crystals) and stir until fully dissolved. For best etching performance, heat the solution to 40–50°C. Refer to the MG Chemicals TDS for complete mixing and usage instructions.Is ammonium persulphate compatible with tin etch resist?Yes — MG Chemicals 410 is compatible with tin etch resist, making it suitable for standard PCB fabrication workflows where tin is used to protect copper traces during the etching process.How should used ammonium persulphate etchant be disposed of?Spent ammonium persulphate solution contains dissolved copper and must be disposed of as hazardous waste in accordance with local regulations. Do not pour down the drain. Contact your local waste disposal authority or a licensed hazardous waste disposal service. Refer to the MG Chemicals SDS for complete disposal guidance.What is the shelf life of the 410 crystals?Ammonium persulphate crystals are stable when stored in a cool, dry location away from heat, moisture, and incompatible materials. Once dissolved into solution, the working life is limited — the solution becomes exhausted as it etches copper. Refer to the MG Chemicals TDS for specific storage and shelf life information.Technical Data Sheet (TDS) | Safety Data Sheet (SDS)
