Formula:KAl(SO4)2 12H2O Relative Molecular Weight:474.39 CAS NO,: 7784-24-9 EINECS No.:5637-689-7 HS CODE.: 2833301000 Appearance: lump, white crystal, white powder Properties:Colorless, transparent, particle or crystalline powder, odorless, nontoxic, tastes slightly sweet and puckery, astringent, easily soluble in water, its water solution appears acid,is would lose crystal water and become white powder on heating Usage; Food industry: Buffering agents and leavening agents in food-grade products. Chemical Industry: Water Flocculant, aluminum tanning agents and after-treating agents for leather tanning in the leather industry, dyeing agents,Astringents,mordants etc. Items Specifications Potassium aluminum sulfate [AlK(SO4)2.12H2O] % 99.5 Plumbum(Pb) mg/kg 5.0 Arsenic (As) mg/kg 2.0 Fluorine (F) mg/kg 30.0 Selenium (Se) mg/kg 30.0 Moisture % 4.0
We are a leading supplier of electroplating chemicals, industrial polishing and welding consumables, water treatment, powder coating, fertilizers. We stock and carry an extensive range of ready to use chemicals. We deal with so many different chemicals and we would like you to contact us for more information about our different chemicals and products.
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We provide the following PCBs PCBs Multi layered type(up to 40 layers) Rigid(single and double sided) Impedance controlling type Flexible type We have not only experience to deliver major Japanese OEM but also export to Russia and China.
As a manufacturer of PCBs, Elecsound can offer reasonable prices, good quality and fast lead time. we can offer 1 layer PCBs, two layers PCBs, 4 layers PCBs and 6 layers PCBs. and we can offer HAL, OSP and immersion gold and so on. Rohs is valiable also. our lead time for 1 and 2 layers PCBs are 7 days. and 4 layers PCBs are 10--14 days. And pls note that we have no minimum quantity for PCBs,we can accept any quantity you need.The price will be competitive also. Pls check if you need any pcbs. and don't forget to send me a "GERBER" file with qty to quote... I am waiting for your contact. PCBs Elecsound can offer single, double-sided, 4 layer to 8 layers.
OEM China Electronics Double-sided PCB Manufacturer Shenzhen One Stop PCBA Service PCB Assembly
OEM China Electronics Double-sided PCB Manufacturer Shenzhen One Stop PCBA Service PCB Assembly
It is me named Victor Cheung greeting from a factory (Main PCB design & Manufacturing / PCB Assembly) with ONE STOP SERVICE and turnkey project (OEM/ODM). We can make and provide you Double-layer PCBs, Multi-layer PCBs, Rigid PCBs, Flexible PCBs, High frequency PCBs and Aluminum-backed PCBs, Copper-backed PCBs etc and PCB asscembly, I wish I could cooperate with your company to make and ship the PCBs / PCBA to you with comparative prices.
PCB Supplier 1) Thickness: 0.1mm-5mm 2) Minimum linewidth0.075mm/3mil 3) Minimum gap0.065/2.8mil 4) Minimum aperture inradium0.15mm 5) Minimum aperture external diameter0.45mm 6) Minimum BGA: 0.2mm 7) Layer 4 layers through hole non-impedance All multilayer boards are printed with 36t screen, the resistance welding oil is 50 tons thicker than the traditional 43t, which provides reliability guarantee for the bga and more precise fine lines.
Product Parameter Materials: FR4 Board Thickness:1.6mm Layer:4 layers Surface finished: hard gold plated Features: Whole PCB with Gold plated Hard gold plated 30u
Double side pcb, multi-layer pcb, f4bk pcb, ceramic pcb, rogers pcb, isola pcb, aluminum pcb, flex pcb, rigid-flex pcb;.
PCB
Fr4, tg¡y135¡ã, 4 layer, finished thickness: 1.6mm Green solder mask white silkscreen Finished copper: 35um Finished surface: hasl-lf Vacuum package& carton box
We can do rigid pcb from 1-20 layers. Vacuum bags
single& multilayers PCB, Roger& FR4 PCB, Taconic H-frequency PCB and impedance control PCB EXPORT PACKING
Countersink holes. 25pcs/packing, less than 25kg/packing
We are a company in shaanxi province provide all series elevator parts such as PCB, Comb plate, guide rail, guide shoe, buttom, swith, oil can, door vane, wheel etc for Fuji, Selcom, LG-OTIS, KONE, SCHINDLER, MITSUBISHI and other famours brand.
1. Rigid Aluminum PCB boards 2. Attained UL ,ISO,CQC certificate 3. IPC Class 2 standard 4. 7 working days for printed circuit board. Inner : vacuum packing/plastic bag Outer : standard carton packing.
Layer count: 4L Base material: FR4 Board Thickness: 1.6mm Min Hole: 0.2mm Line width/Line Spacing: 0.1MM/0.1MM Surface Finish: Immersion Gold + Gold Finger.
Layers(2-38) Lines and Spaces (Volume 3/3 Prototype 2.5/2.5) Controlled Impedance(+/-10% Stamdard) Blind and Buried Vias Microvias,Laser Drill Backpanels(up to 1 inch thick) MCM/Substrates High performance and Emerging Materials Sequential Lamination Micro BGA,BGA Plug Finishing:HAL,Entek(OSP),Gold Finger,Flash Gold,Immersion Gold,Immersion Tin,Immersion Silver. Special PCBs Heavy Copper PCBs.
