Beyond open-market broker grades: Direct Tier-1 refinery supply for elemental Rubidium (Rb ≥99.995%) and Cesium (Cs ≥99.995%) with pre-contract factory audits, plus 2,500 kg of 99.9998% (5N8) Isotope Copper Powder ready for immediate inspection in our Hong Kong bonded warehouse.
Elemental cesium metal conforming to YS/T 1245-2018. Renowned for its low melting point (28.5°C) and supreme electropositive reactivity. Essential for atomic clock frequency standards, magnetometers, and specialized photoelectric cathodes. Shipped in dedicated Swagelok-equipped cylinders or sealed ampoules.
Non-radioactive isotope copper powder (Cu-63/Cu-65) with chemical purity exceeding 99.9998% (5N8). Oxygen content below 1 ppm. Crystalline micro-particles (D50 4.1µm). Supplied in sealed glass ampoules (190 mm × 40 mm), five per package box and 80 per export carton (about 13.8 kg net). 2,500 kg physical stock stored in Hong Kong bonded warehouse ready for immediate buyer sampling, SGS verification, and settlement.
Chemical Purity≥99.9998% (5N8)
Oxygen Content<1 ppm Extreme Inert Seal
Particle DistributionD50 4.1 µm · Crystalline
Current Stock2,500 kg physical stock
Storage LocationHong Kong Bonded Logistics Zone
Export ProtocolNon-Radioactive
LAYER 01 · AMPOULE
200g Glass Ampoule
Sealed glass ampoule, 190 mm long × 40 mm diameter, up to 200 g of copper powder each.
LAYER 02 · PACKAGE BOX
1 kg Package Box
Five ampoules stand in one box, 240 × 220 × 40 mm, about 1 kg net per box.
LAYER 03 · EXPORT CARTON
Export Carton
80 ampoules per carton, about 13.8 kg net and 21.8 kg gross on the carton label. UN 4G fibreboard box with Class 4.1 labels.
Cu≥99.9998%
Oxygen<1.0 ppm
Fe<0.2 ppm
Pb<0.1 ppm
Ni<0.1 ppm
Zn<0.1 ppm
Ag<0.2 ppm
As<0.05 ppm
Hong Kong Bonded Physical Stock50% T/T advance, 50% balance upon buyer physical inspection & SGS pickup in Hong Kong
Micrographs of the copper powder from an independent laboratory report. The particles are crystalline, faceted grains, not smooth spheres.
1.0 µmD10
4.1 µmD50, the median grain
12.5 µmD90
Laser-diffraction particle size, average of three runs. Sample tested by an independent laboratory, January 2025. Copper powder sample, not a specific shipment.
ENGINEERED TO ARRIVE
Three layers between the metal and the road.
1
The tank316 stainless steel with a wall thicker than 2 mm. Every tank is helium leak-tested before it ships.
2
The foamA laser-cut EVA insert gives each tank its own deep pocket, so the tank stands upright and metal never touches metal.
3
The caseA riveted aluminum shell with latches, orientation labels and UN Class 4.3 marking for dangerous-when-wet cargo.
> 2 mmtank wall, 316 stainless steel
< 10−11helium leak rate, mass-spectrometer tested
0.4 MPaworking pressure
5 kgof cesium in each tank
320 mmoverall height, 160 mm base
29 kggross weight of a loaded case: two tanks, 10 kg of metal
Tank figures are from the supplier packing specification for the 5 kg cesium tank. Case weight is from the shipping label of a rubidium case. Illustration, not a photograph.
PACKAGING IN PRACTICE
Sealed, cushioned, labelled.
Each 5 kg stainless tank travels in its own foam-cut flight case. The tank, the insert and the outer case, as they leave the warehouse.
5 kg tank316 stainless steel, needle valves, quick couplers, sight glassesFoam-cut flight caseCushioned pockets hold two tanks uprightOuter caseRiveted aluminum shell with orientation and caution labels
ON CAMERA
See it before you inspect it.
Phone footage from the warehouse: tanks seen from above, and the view through the sight glass. Trimmed, with the sound removed.
Tanks in storageA walk over the stock, then sight-glass viewsClose look at a tankClamp, valves and the sight glass up closeInside a flight caseTwo 5 kg tanks in their foam pockets, then the sight glasses up close. A rubidium case, 10 kg of metal.
PURITY & FULFILLMENT BENCHMARK
Why institutional buyers source directly from Apex
Extreme purity alkali metals and non-radioactive isotopes require sovereign export compliance, verified trace impurity assays, and zero-compromise hermetic seals.
Evaluation Criteria
Open B2B Platforms (Alibaba / Marketplace Brokers)
Apex Material Science (Direct Tier-1 Desk)
Actual Purity & Grade
99.0%–99.9% (2N–3N) industrial salts or oxidized copper powder (>500 ppm oxygen); unsuited for atomic/quantum use.
GOVERNMENT HAZMAT & ICP-MS LABORATORY CERTIFICATES
Verified Scans & Regulatory Dossier (正本)
Inspect authentic Chinese refinery test reports (YS/T 1246-2018 / YS/T 1245-2018), PRC Dangerous Goods Production Licenses, and Hong Kong bonded warehouse compliance records.
Supplier details are redacted to protect the refinery. Unredacted originals are provided to qualified buyers under NDA.
INSTITUTIONAL INQUIRY DESK
Request Formal Offer & COA
Direct communication with our commercial desk. Qualified institutional buyers receive an itemized Full Corporate Offer (FCO), comprehensive COA pack, and factory inspection protocols within 24 hours.
Buyers are welcome to visit the manufacturing site in China to verify inventory and request samples for testing. Samples are provided on site only and are not shipped internationally. A prior agreement and prerequisites apply.
01 · Element Crystal (Rb 99.995%)
