How does Apex Material Science differ from standard Alibaba or Made-in-China chemical brokers?

Open marketplaces predominantly list 99.0%–99.9% (2N–3N) industrial salts or unbacked broker offers without dangerous goods export licenses. Apex Material Science provides direct Tier-1 refinery allocation for ≥99.995% (4N5/5N) elemental Rubidium and Cesium (hosting pre-contract factory site visits) and holds 2,500 kg of 99.9998% (5N8) Isotope Copper Powder physically in a Hong Kong bonded warehouse for immediate inspection and pickup.

Why are prices listed as 'By Formal Inquiry (RFQ)' rather than fixed public checkout prices?

Ultra-high purity alkali metals (UN Class 4.3 PG I) and 5N8 ultrafine powders require customized container engineering (5g–100g break-seal glass ampoules vs. 5kg Swagelok 316 SS cylinders), specialized IATA/IMDG hazmat freight routing, and volume-tiered refinery allocations. Submitting an RFQ allows our desk to issue an accurate Full Corporate Offer (FCO) with batch-specific ICP-MS COA within 24 hours.

Can buyers inspect the 5N8 Copper Powder in Hong Kong or visit the Rubidium/Cesium refinery before full payment?

Yes. For Isotope Copper Powder (Cu ≥99.9998%), 2,500 kg is stored in our Hong Kong bonded warehouse where buyers or appointed agencies (SGS/Intertek) can inspect and sample prior to 50% balance T/T settlement and pickup. For Rubidium and Cesium, we host pre-contract refinery site visits in mainland China.

High-Purity Rubidium Metal (CAS 7440-17-7), Cesium Metal (CAS 7440-46-2) 99.995% & 5N8 Ultrafine Isotope Copper Powder (CAS 7440-50-8)

EXCLUSIVE ALLOCATION · 3 STRATEGIC ELEMENTS

Strategic Materials

Ultra-high-purity alkali metals and non-radioactive isotope copper. Verified by ICP-MS assay and packed to UN Class 4.3 requirements.

ELEMENT 37 · GROUP 1 · PERIOD 5

Rubidium Metal Rb ≥99.995%

YS/T 1246-2018 CAS 7440-17-7 UN 1423 Class 4.3 PG I Tier-1 Direct Allocation

01 · Element Crystal (Rb 99.995%)

AUTHENTICATED ICP-MS SCAN (正本) Standard YS/T 1246-2018 · Lot Verification JC-ICP-03

COA PDF [PDF] Compliance Dossier [PDF]

Ultra-high purity elemental rubidium conforming to YS/T 1246-2018 standards. Engineered strictly for quantum optics, laser cooling, atomic frequency standards, and advanced defense research. Dispatched under pressurized 99.999% dry argon in 316 stainless steel chambers or vacuum-sealed borosilicate ampoules.

Purity Grade ≥99.995% (4N5)

Total Impurities <50 ppm Metallic Sum

Physical Constants m.p. 39.3°C · 1.53 g/cm³

Supply Formats 5kg SS Cylinder / 5g–100g Ampoule

MOQ & Dispatch 500g+ / Bulk (5–7 Days)

Commercial Settlement 50/50 T/T Pre-Ship SGS Inspection

STEP 01 · CONTAINMENT

316 Dual Swagelok

Heavy-gauge stainless steel cylinder with dual valves & optical quartz inspection window, or flame-sealed ampoules.

STEP 02 · ATMOSPHERE

Argon Overpressure

Pressurized with 99.999% dry argon (inert atmosphere, minimal oxygen/moisture ingress).

STEP 03 · ARMORING

UN Flight Case

Riveted heavy aluminum transit case with laser-cut shock-absorbent EVA foam conforming to UN 1423 Class 4.3 PG I.

Rb≥99.995%

Cs<10 ppm

K2.0 ppm

Na1.0 ppm

Mg<1.0 ppm

Pb<1.0 ppm

Al<1.0 ppm

Ca<1.0 ppm

Direct Refinery Allocation Pre-contract factory site visits hosted for institutional buyers · Quoted by formal FCO

Inquire about Rubidium

ELEMENT 55 · GROUP 1 · PERIOD 6

Cesium Metal Cs ≥99.995%

YS/T 1245-2018 CAS 7440-46-2 UN 1407 Class 4.3 PG I Golden Crystalline Phase

01 · Golden Crystal View-Port

AUTHENTICATED ICP-MS SCAN (正本) Standard YS/T 1245-2018 · Lot CS-4N5 Active

COA PDF [PDF] Compliance Dossier [PDF]

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.

Purity Grade ≥99.995% (4N5)

Total Impurities <50 ppm Metallic Sum

Physical Constants m.p. 28.5°C · 1.93 g/cm³

Supply Formats 5kg SS Canister / 5g–100g Ampoule

MOQ & Dispatch 500g+ / Bulk (5–7 Days)

Commercial Settlement 50/50 T/T Pre-Ship SGS Inspection

STEP 01 · CONTAINMENT

Quartz Viewport Canister

316 SS cylinder with integrated optical quartz viewport to inspect golden crystallization without breaching seal.

STEP 02 · ATMOSPHERE

Argon Overpressure

Pressurized under 99.999% dry argon (zero oxygen / zero moisture contamination).

STEP 03 · ARMORING

UN Flight Case

Riveted tamper-evident flight case certified for UN 1407 Class 4.3 PG I hazardous air/sea cargo.

Cs≥99.995%

Rb<20 ppm

K3.0 ppm

Na1.5 ppm

Mg<1.0 ppm

Pb<1.0 ppm

Al<1.0 ppm

Fe<1.0 ppm

Direct Refinery Allocation Pre-contract factory site visits hosted for institutional buyers · Quoted by formal FCO

Inquire about Cesium

ISOTOPE CU-63 / CU-65 · CAS 7440-50-8 · HS 7406.10

Isotope Copper Powder Cu ≥99.9998% (5N8)

HK Bonded Stock: 2,500 kg Non-Radioactive SGS On-Site Inspection

Hong Kong Bonded Warehouse Master Carton

01 · Copper Ampoules in HK Warehouse

AUTHENTICATED ICP-MS SCAN (正本) Standard GOST 859 / Apex 5N8 · Batch 2026-CU5N8

COA PDF [PDF] Inspection Protocol [PDF]

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 Distribution D50 4.1 µm · Crystalline

Current Stock 2,500 kg physical stock

Storage Location Hong Kong Bonded Logistics Zone

Export Protocol Non-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 Stock 50% T/T advance, 50% balance upon buyer physical inspection & SGS pickup in Hong Kong

Inquire about Copper

SCANNING ELECTRON MICROSCOPE

What 4.1 µm of copper looks like.

Micrographs of the copper powder from an independent laboratory report. The particles are crystalline, faceted grains, not smooth spheres.

Scanning electron micrograph of copper powder at low magnification

Scanning electron micrographs of copper powder grains at higher magnification

Scanning electron micrograph of faceted copper powder grains

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.

Cross-section: two stainless tanks seated in the foam pockets of an aluminum flight case

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 316 stainless steel tank with valves and sight glasses — **5 kg tank**316 stainless steel, needle valves, quick couplers, sight glasses

Flight case with foam insert cut for two tanks — **Foam-cut flight case**Cushioned pockets hold two tanks upright

Closed aluminum flight cases with handling labels — **Outer case**Riveted 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 views

Close look at a tankClamp, valves and the sight glass up close

Inside 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.	Rb & Cs ≥99.995% (4N5/5N, <50 ppm metals) · Isotope Cu Powder ≥99.9998% (5N8, Oxygen <1 ppm, D50 4.1µm).
Inventory & Export Control	Paper trading brokers with zero physical stock; frequent customs confiscation due to missing Class 4.3 DG export licenses.	Cu: 2,500 kg in Hong Kong Bonded Warehouse · Rb/Cs: Direct Refinery Control + Pre-Contract Site Visit.
Packaging Engineering	Standard plastic bottles or thin glass vials prone to atmospheric seal failure and violent oxidation during transit.	5kg 316 SS Swagelok Cylinders (99.999% Ar) in UN Flight Cases + 5g–100g Vacuum Flame-Sealed Borosilicate Ampoules.
Pricing & Settlement	Unverified low-price listings ("$1–$10/kg") are common, often paired with 100% upfront wire requests and no independent assay verification.	Formal Inquiry-Based FCO Pricing · Risk-mitigated 50% T/T advance & 50% balance upon SGS/buyer physical inspection & pickup.

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.

LAB REPORT · 2-PAGE COA Rubidium ICP-MS Assay Standard YS/T 1246-2018 · JC-ICP-03 LAB REPORT · 2-PAGE COA Cesium ICP-MS Assay Standard YS/T 1245-2018 · Lot CS-4N5 BONDED STOCK · 2-PAGE COA Isotope Copper 5N8 GOST 859 / 5N8 · Oxygen <1 ppm ↗ PRC HAZMAT LICENSE Safety Production Dossier 2026–2029 PRC DG License (金属铷/金属铯)

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.

Contact Person *

Institutional Entity *

Official Corporate Email *

Selected Material *

Target Allocation / Quantity *

Destination Airport / Bonded Zone *

Technical Specifications & Delivery Requirements

Standard terms: 50/50 T/T · SGS inspection

From Raw to Remarkable.