“Sterile” gets used loosely in glove marketing, and it causes real confusion when you’re trying to decide what’s safe for a flow hood versus what’s fine for handling substrate. The short version: two of our three glove grades are genuinely sterile out of the packet, and one isn’t – but “sterile” alone doesn’t tell you everything you need to know either. Here’s what the standards and certifications actually mean.
What “sterile” actually means on a glove pack
A glove described as sterile has been through a validated sterilisation process – almost always gamma irradiation for medical nitrile gloves – and is individually sealed so it stays that way until you open the packet. This is a meaningfully different claim from “clean” or “hygienic,” which have no regulated definition. Both our surgical and sterile examination grades meet this bar; our box of 100 does not, which is exactly why it’s priced and positioned differently.
Surgical grade: sterile plus a clinical standard
Our Sterile Surgical Nitrile Gloves are gamma-irradiated, individually packeted, and CE marked (0088) to EN455 Parts 1–4 with an AQL of 1.5 – the same standard used for surgical gloves in clinical settings. AQL (Acceptable Quality Level) measures the maximum allowable rate of pinholes or defects per batch; 1.5 is a strict tolerance, which matters when a single pinhole can undo aseptic technique at the flow hood. This is the grade for pouring agar, spore syringe work, and any open-culture handling.
Sterile examination grade: sterile, without the surgical-specific testing
Our Sterile Powder-Free Nitrile Gloves are also individually packeted and gamma-irradiated sterile on opening, but they’re certified as examination gloves rather than surgical gloves – a slightly less stringent testing standard, still entirely appropriate for tasks like injecting grain bags or handling substrate once it’s been sterilised, where you want clean, sterile hands but aren’t doing open-culture transfer work.
Medical grade Cat III PPE: protective, not sterile
Our Blue Nitrile Gloves, Box of 100 are Cat III PPE – a genuine, regulated protective equipment category – but they are not sterile out of the box and aren’t individually packeted. “Medical grade” here refers to the material and manufacturing standard, not sterility. Wipe them with isopropyl alcohol before any lighter-duty task where you want them closer to sterile; they’re not a substitute for the sterile grades in aseptic work.
Which certification actually matters for your task?
- Working at the flow hood or transferring cultures? You need genuine sterility and the tighter AQL of a surgical-grade glove.
- Injecting bags or handling already-sterilised substrate? Sterile examination grade covers you without paying the surgical premium.
- Mixing substrate or general handling? Cat III PPE protection is what you actually need – sterility isn’t the point of this task.
For the full price and use-case breakdown across all three, see our Nitrile Glove Buying Guide. If you’re setting up a sterile workspace more broadly, our Bulk Substrate Guide covers the wider sterilisation process these gloves fit into.