The C55UP is a two-piece, tri-layer ultra-pure HDPE 55-gallon drum with integrated chime, designed for aggressive and high-danger chemistries — including Packing Group I materials, which can only ship in drums carrying the X-rated UN marking. Its two-piece design adds a handling-ring system for hardware protection and inventory identification. And it gives up nothing to get there: the same tri-layer construction, virgin ultra-clean inner liner, and Class 100 LPC verification as the rest of the ultra-pure line.
A top handling ring protects closures and any custom pump assembly or dip tube installed in the drum. A top + bottom ring option adds an additional protective ring at the bottom of the drum.
Body and ring color combinations give operations a visual inventory system — chemistry, line, or customer identified at a glance across the warehouse.
Every C55UP carries a unique traceability identification label, pairing the visual system with documented identity.
Packing Group I products require an X-rated drum. The C55UP is marked 1H1/X1.7/250, so a single specification covers the PG I–III range rather than splitting the program across two drums.
PG I · II · III · 1H1/X1.7/250Intermediates change hands more than once, and every transfer is a chance to pick up contamination. The tri-layer wall keeps colorants and UV stabilizers in the exterior structure, so the chemistry only ever contacts virgin ultra-clean HDPE.
Tri-layer · virgin inner linerWhere chain of custody has to be demonstrated rather than asserted, each drum traces back to its production record. Certification documents and test summaries are available per configuration.
Per-drum traceability · documents per configurationAn X rating is tested to the Packing Group I standard, which means it also satisfies II and III. Specify it once and the same drum carries across the range.
X-rated · covers PG I through IIIEvery one of them still gets the full ultra-pure build — tri-layer construction, virgin inner liner, Class 1000 clean-room finishing, and Class 100 LPC verification. The X rating and the cleanliness are not a trade.
| Attribute | Specification |
|---|---|
| Capacity | 55 gal (208 L) |
| Design | Two-piece, closed-head (tight-head) drum with integrated chime and handling ring |
| Construction | Tri-layer coextruded HDPE; colorants and UV stabilizers isolated in the exterior structure |
| Inner liner | Virgin ultra-clean HDPE — the only product-contact surface |
| Bung openings | Accept industry-standard high-purity extraction, gasket, and O-ring styles, including NPT and Buttress options |
| UN/DOT certification | 1H1/X1.7/250 — X-rated; certified for PG I, II & III, with and without dip tube |
| Dip tube | UN/DOT certified with and without dip tube |
| Ring options | Top ring, or top + bottom rings |
| Identification | Body and ring color combinations for visual inventory identification |
| Cleanliness verification | Class 1000 clean-room finishing; Class 100 liquid particle-count laboratory verification |
| Traceability | Unique traceability identification label per drum |
| Dimensions & tare weight | Top diameter 23.8 in (60.5 cm) · Overall height 36.25 in (92.1 cm) standard profile, 38.0 in (96.5 cm) tall profile · Overflow capacity 60 gal (227 L) · Drum body weight 24 lb (10.9 kg). Drum weight varies pending ratings. |
| IC55UPView IC55UP | K55UPView K55UP | C55UPThis page | ||||
|---|---|---|---|---|---|---|
| Design | One-piece, closed-head | One-piece, closed-head — updated blow-molding controls | Two-piece with handling ring | |||
| Packing groups | II & III | II & III | I, II & III — X-rated marking | |||
| Best suited when | You need the workhorse ultra-pure drum, with a 300 kPa option for higher-pressure chemistries | Your KPI is the lowest metal extractables, with a vented option available | You ship Packing Group I chemistry, or use ring colors for inventory identification | |||
| Shared by all three | Tri-layer construction · virgin ultra-clean inner liner · Class 100 LPC verification · unique traceability label per drum | |||||
Full side-by-side specifications for the complete lineup live on the All Products page.
Answers to the questions we hear most before a first quote. If yours isn't here, the form is the fastest route to a specific answer.
Packing Group I — the highest-danger transport classification — can only ship in HDPE drums that carry the X rating within the UN/DOT embossment. The C55UP is UN tested and certified for Group I, II, and III chemistries with that X-rated marking, 1H1/X1.7/250. Our IC55UP and K55UP are certified for Group II and III only.
A top handling ring protects closures, custom pump assemblies, and dip tubes installed in the drum, and a top + bottom ring option adds an additional protective ring at the bottom. Ring and body color combinations give operations a visual inventory-identification system.
Yes. The C55UP is UN tested and certified for Group I, II, and III chemistries, with and without a dip tube — so operations that want one drum platform across packing groups, or that value the ring system for identification and hardware protection, can standardize on it.
The C55UP shares the tri-layer construction of our ultra-pure line: colorants and UV stabilizers are isolated in the exterior structure, and the chemical only contacts a virgin ultra-clean inner liner. Cleanliness is verified in our in-house Class 100 liquid particle-count laboratory, and every drum carries a unique traceability identification label.
Tell us your purity, performance, and compliance requirements. Our team will confirm the right configuration, ring system, and documentation to support qualification.