# NanoArc multidisciplinary lab — chemistry equipment inventory

**Inventory date:** 2026-08-14

**Owner:** Tristan

**Scope:** Chemistry, PCM/materials preparation, electrochemistry, and supporting measurements. The separately maintained electrical-equipment inventory is not duplicated here.

## Heating and temperature

- One SH-2 magnetic stirrer/heater, confirmed as the existing hotplate. It
  heats and magnetically stirs; temperature-control accuracy, overshoot, and
  water-bath coupling remain to be characterized.
- One PTFE-coated magnetic stir bar.
- One DMM capable of reading its supplied exposed-junction thermocouple probe.
- Spare PTFE 3D-printer tubing proposed as an interim liquid-isolation sheath
  for the thermocouple. The arrangement requires leak, response-time, and
  positioning tests before use.
- One BIOS 1-inch dial Celsius thermometer, range -18 to 110 °C. Immersion
  limits, accuracy, and webcam readability remain to be verified.

## Mass and volume

- One operational digital pocket scale: 200 g capacity, 0.01 g displayed
  resolution, and tare function. No check masses are currently owned and its
  accuracy has not been independently verified.
- One 25 mL borosilicate graduated cylinder.
- One 250 mL borosilicate graduated cylinder.
- Ten disposable 1 mL transfer pipettes. These are not treated as calibrated
  volumetric pipettes.

## Glassware and handling

- One 250 mL borosilicate beaker.
- One 600 mL borosilicate beaker.
- One 250 mL borosilicate Erlenmeyer flask.
- Six rimmed borosilicate test tubes, 20 x 150 mm.
- One aluminium test-tube rack confirmed to accept the supplied 20 mm tubes
  despite an advertised 15 mm specification.
- Ten 70 mm watch glasses.
- One borosilicate stirring rod, 7 x 300 mm.
- Six borosilicate stirring rods, 5 x 150 mm.
- One metal/wood test-tube clamp.
- One 75 mm plastic funnel.
- One transparent 500 mL PE wash bottle.
- Assorted Mason jars and miscellaneous containers. Quantities, materials,
  capacities, lid materials, and prior contents are not fully catalogued.
  Treat these as ambient-pressure containers only; do not assume they are
  borosilicate, hotplate-safe, chemically compatible, or pressure-rated.

## Indication, PPE, containment, and emergency provisions

- Eighty universal pH-paper strips, indicated range pH 1-14. These support
  coarse screening rather than calibrated pH measurement.
- One pair of ordinary safety glasses.
- Indirect-vent chemical-splash goggles.
- Routine nitrile gloves.
- Compatible plastic secondary-containment tray.
- Small eyewash bottle for immediate initial flushing. Sustained running water
  is available at a household sink/shower less than 30 seconds from the
  alternate bench; the travel route must be cleared before wet work.
- Fire extinguisher and heat-safe work surface near the alternate bench.
- Coffee filters and ordinary low-risk expendables.

Not presently recorded as owned: chemical-resistant apron, dedicated spill
bundle, retort stand, fixed thermometer/probe clamp, water-bath vessel
restraint, scale check masses, milligram balance, calibrated pH meter, or
certified local exhaust.

## Workspace disposition

- Perform heated or open wet chemistry at the alternate bench beside the
  openable exterior window.
- Reserve the mixed-use desk containing the Ender 5 for dry planning,
  instruments, and closed-container weighing. Do not expose the printer,
  filament, mechanics, or mains equipment to liquids, salts, steam, or reagent
  residue.
- Keep the room HEPA purifier outside the steam and splash path. It is useful
  for particles and wildfire smoke, not accepted as chemical-vapour extraction
  or a fume hood.
- Reagents and retained liquids currently share one general storage area.
  Compatibility segregation and complete labels are pending.

## Current capability limits

- The owned apparatus supports small-batch SAT preparation rehearsals,
  qualitative crystallization, agar/hydrogel screening, benign crystal growth,
  and coarse pH checks after the applicable protocol preflights pass.
- The 0.01 g scale supports formulation screening but cannot defend the formal
  0.010 g PCM-cell leakage boundary.
- The DMM probe and dial thermometer require a common ice/hot-water comparison
  before quantitative thermal work.
- Disposable transfer pipettes and graduated cylinders do not substitute for
  calibrated volumetric apparatus.
- No volatile-solvent, toxic-gas, concentrated-corrosive, or unknown-mineral
  processing is authorized by this inventory.