If your lab stores hydrochloric acid, sulfuric acid, sodium hydroxide, or any of the corrosive reagents lined up on a typical reagent shelf, you already know where the trouble starts: it is not the bottles, it is the steel under the paint. A painted steel cabinet that lives with acid fumes for six months begins to show bubbles under the coating, then rust at the hinge, then a soft spot in the floor where a small leak went unnoticed. By the time you see it, the shelf your reagents sit on is no longer something you trust. That is why labs that handle corrosives look for a PP acid base cabinet rather than another steel one — polypropylene simply does not react to acid fumes the way steel does. This guide is written from the factory floor where we build them. It is the spec checklist we would run before spending lab money on a single unit.
A reagent cabinet has to be PP all the way through
The first trap in this category is a steel cabinet wrapped in a thin polypropylene sheet. From outside it looks the part. Inside, the moment the coating gets knocked at an edge, the acid fumes have iron to work on. Real corrosion resistance means the body, the shelves, the handles, and the hinges are all polypropylene, welded as one unit.
When acid splashes on true PP, it does not eat through. When alkali sits against it for years, it does not turn brittle and flake. Compare that with a powder-coated steel cabinet: knock the corner, the iron shows, and hydrochloric or sulfuric fumes for half a year are enough to raise rust blisters under the paint. We build ours in a white porcelain finish, which is also what makes leaks and stains easy to spot at a glance.
The checklist — six things to verify on any PP acid cabinet quote
Run these against whatever you are being quoted. They are the difference between a cabinet that lasts and one that looks right on day one.
1. All-PP welded construction. Body, shelves, handles, hinges — every contact point is polypropylene. If any part is steel behind plastic, the fumes will find it.
2. Spill-containment shelves with raised edges. Each shelf has a tray edge on all four sides, about 2 cm deep. Knock a small bottle over and the spill stays on that shelf instead of running onto the bottles below. The shelves are height-adjustable, pull out for washing, and are usable on both sides.
3. Two independent locks, non-interchangeable keys. The cabinet takes two separate locks with keys that do not open each other. That is the physical setup for two-person reagent management — one person alone cannot get in, which cuts down on accidental pulls of the wrong bottle.
4. CORROSIVE labeling and louvered vents. Every door carries a CORROSIVE warning label, and the cabinet has louvered ventilation openings you can tie into your lab exhaust system. Fumes leave the cabinet; they do not build up inside it.
5. PP injection-molded hinges and a locating plate. PP hinges do not sag or seize in a damp, fume-heavy room the way steel ones do. Inside, a hollow locating plate keeps reagent bottles from rocking when the door shuts.
6. A glass-door option if you check stock often. Glass-door units let you see what is inside without opening the door and releasing fumes into the room. Solid doors are fine for storage you rarely touch; glass is better for a cabinet you open all day.
Matching the size to your reagent room — from 4 gallon to 90 gallon
A pp acid cabinet 4 gallon size is a bench-top unit for a corner next to a fume hood. A 22 gallon single-door unit is the working-lab standard. A 90 gallon double-door unit is for a central reagent room that moves full-size drums. Here is the full range we build, so you can match it to your shelf count:
| Capacity | External H×W×D | Shelves | Weight | Door |
|---|---|---|---|---|
| 2 gallon | 330×330×330 mm | 0 | — | Single |
| 4 gallon | 560×430×430 mm | 1 | 10 kg | Single |
| 12 gallon | 890×460×590 mm | 1 | — | Single |
| 15 gallon | 1120×460×590 mm | 1 | — | Single |
| 22 gallon | 1650×460×590 mm (inner 1540×405×580) | 2 | 40 kg | Single |
| 60 gallon | 1650×860×860 mm | 2 | — | Double |
| 90 gallon | 1650×1090×860 mm (inner 1540×775×1070) | 2 | 75 kg | Double |
For a reagent room that wants glass visibility and higher capacity, we also build a 200 L series at 1800×900×450 mm, 60 kg, three shelves, in several door layouts: four-door with upper and lower viewing windows, four-door with upper louvers and a lower window, double-door with upper glass and lower solid panel, double-door fully glass, and double-door with upper and lower louvers. Pick the door layout to match how often you open it.
What lab-safety guidance expects — and how to read it
EHS managers often search for terms like a chemical cabinet OSHA-compliant layout, NFPA storage guidance, or REACH segregation rules. It helps to know what those standards are actually asking for, because the answer is never “buy a certified box.”
What these rules point to is a set of physical features: corrosives segregated from incompatible chemicals, a spill-containment base so a leak does not run across the floor, ventilation you can connect to exhaust, and locking doors. Our cabinets are built with exactly those features — spill shelves, louvered vents, dual locks, and CORROSIVE labels — and we ship with CE. How you meet your local lab-safety requirements is a conversation between you and your EHS team. A well-built PP cabinet gives you the hardware those rules are written around.
The spec sheet
| Specification | Value |
|---|---|
| Material | Full polypropylene (PP), welded, white porcelain |
| Shelves | Spill-containment, ~2 cm raised edges, adjustable, washable |
| Locks | Dual independent locks, non-interchangeable keys |
| Ventilation | Louvered openings, connectable to exhaust |
| Sizes | 2 to 90 gallon, plus 200 L glass-door series |
| Door options | Solid or glass, single or double |
| MOQ | 1 unit (standard) |
| Lead time | 7–15 days standard, 20–30 days custom |
| Warranty | 1 year |
| Certification | CE |
FAQ
What is the minimum order? One unit. You do not have to buy a bank of cabinets to start.
How long does delivery take? Standard units ship in 7–15 days. Custom work — your logo, a specific door layout, custom packaging — runs 20–30 days.
Is it really all PP, or steel with a coating? All PP. Body, shelves, handles, and hinges are polypropylene, welded as one unit.
Can I see inside without opening the door? On the glass-door models, yes. That keeps fumes in the cabinet while you check stock.
What is the warranty? One year. We send replacement parts free for non-manufacturing defects.
Is it CE certified? Yes.
Where do I get a price? Send us the sizes and quantities you need — quotes go out within 24 hours.
A final buying note
For a lab that stores acids and bases, the cabinet is part of the safety system, not a piece of furniture. A steel cabinet that looks cheap on day one will spend year two rusting around the fumes it was never meant to live with. A pp acid base cabinet built from welded polypropylene — spill shelves, dual locks, louvered vents, and the size that matches your shelf count — is the version you set up once and stop replacing.
Cindy Steel Furniture — factory-direct PP acid-base cabinets, built for labs that store corrosives.
