Draeger Chromic Acid Detector Tubes
1 Draeger short-term detector tube for Chromic acid, measuring range 0.1 to 0.5 mg/m3 compare discoloration. Ranges, pump strokes, measuring times and color changes as published in the Dräger-Tubes & MicroTubes Handbook, 22nd edition (p. 162); prices are live. Ships in 1–2 business days.
Every Draeger tube for Chromic acid
| Part number | Tube | Measuring range | Strokes (n) | Measuring time | Color change | Pack | Price | |
|---|---|---|---|---|---|---|---|---|
| 6728681 | Draeger Chromic Acid 0.1/a Detector Tubes | 0.1 to 0.5 mg/m3 compare discoloration | 40 | approx. 8 min | white → purple | Box of 9 | $189.52 |
Source: Dräger-Tubes & MicroTubes Handbook, 22nd edition (order no. 90 92 086), p. 162, Dräger Safety AG & Co. KGaA. Each tube page carries the full handbook entry: standard deviation, temperature and humidity limits, reaction principle and cross-sensitivities.
Chromic acid exposure limits
| Limit | Value |
|---|---|
| OSHA PEL | (as CrO3): TWA 0.005 mg/m³ |
| NIOSH REL | (as Cr): Ca TWA 0.0002 mg/m³ (8-hours) |
| NIOSH IDLH | Ca [15 mg/m3 {as Cr(VI)}] |
| CAS number | 1333-82-0 (CrO3) |
| Formula | CrO₃ (acid) |
| Other names | Chromic acid (CrO3), Chromic anhydride, Chromic oxide, Chromium(VI) oxide (1:3), Chromium trioxide, Zinc chromate |
Source: NIOSH Pocket Guide to Chemical Hazards, Chromic acid and chromates (OSHA PEL from 29 CFR 1910.1000 Table Z as listed there). TWA = 8-hour time-weighted average, ST = short-term (15-minute), C = ceiling, Ca = NIOSH potential occupational carcinogen. NIOSH physical description: CrO3: Dark-red, odorless flakes or powder. [Note: Often used in an aqueous solution (H2CrO4).]
Draeger short-term tubes are read on a Draeger accuro or X-act 5000 tube pump. Per the handbook (pp. 28–29), Draeger tubes and Draeger pumps are matched at the factory and form a single unit; other makers' pumps and tubes are not interchangeable with them. All Draeger tubes A–Z.
Guides: Draeger tubes by gas and range · tube ranges and the OSHA and NIOSH limits · what Draeger tubes measure · what the tube names mean · how to read a tube · the accuro pump.
Draeger Chromic acid tube questions
Which Draeger tubes measure Chromic acid? 6728681 (0.1 to 0.5 mg/m3 compare discoloration).
What is the lowest range Draeger tube for Chromic acid? 6728681, 0.1 to 0.5 mg/m3 compare discoloration, 40 strokes.
What is the OSHA exposure limit for Chromic acid? OSHA PEL (as CrO3): TWA 0.005 mg/m³; NIOSH REL (as Cr): Ca TWA 0.0002 mg/m³ (8-hours); IDLH Ca [15 mg/m3 {as Cr(VI)}] (NIOSH Pocket Guide).
Which pump reads Draeger Chromic acid tubes? The Draeger accuro hand pump or the X-act 5000 pump. MicroTubes, where listed, are read on the X-act 7000.
Do Draeger Chromic acid tubes expire? Yes. The expiration date (month and year) is printed on the package; the handbook states a typical shelf life for the customer of up to two years, stored sealed at the temperature on the package strip (handbook section 2.13).