Formaldehyde is a colorless, flammable gas that can be carcinogenic to humans, and is a common additive to building materials and household products. Formaldehyde is also formed in the environment upon oxidation of a variety of hydrocarbons, including natural gas (methane). Symptoms of exposure to low concentrations of formaldehyde may include headache, nausea, throat and skin irritation, and exacerbated chemical sensitivity. For a quick summary of formaldehyde exposure basics, please see the [ASTDR’s ToxFAQs for Formaldehyde](https://www.atsdr.cdc.gov/toxfaqs/TF.asp?id=219&tid=39). For much more in-depth information, please see the [ASTDR’s Toxicological Profile for Formaldehyde](https://www.atsdr.cdc.gov/toxprofiles/tp.asp?id=220&tid=39). In Public Lab, we’ve been exploring low-cost methods for monitoring airborne concentrations of formaldehyde and low-cost methods for mitigating exposure to it. ### Formaldehyde projects Projects related to formaldehyde monitoring and exposure mitigation can be found on the following wikis. Low-cost monitoring of airborne formaldehyde using colorimetric tubes: https://publiclab.org/wiki/formaldehyde-test-kit Low-cost monitoring of airborne formaldehyde using a passive badge sampler and smartphone app: https://publiclab.org/wiki/smart-form Personal exposure to formaldehyde (and information about exposure): https://publiclab.org/wiki/formaldehyde-exposure Low-cost remediation or airborne formaldehyde: https://publiclab.org/wiki/diy-indoor-air-quality-remediation-kit ### Current formaldehyde research in Public Lab Follow active development on [the tag 'formaldehyde.'](/tag/formaldehyde) You can also [subscribe](/subscriptions) to to the formaldehyde tag to get email updates when a research note, wiki, or question gets tagged as related to formaldehyde. **** ### Questions in Public Lab related to formaldehyde [questions:formaldehyde] **** ### Activities to try in Public Lab related to formaldehyde [activities:formaldehyde] **** ...
Author | Comment | Last activity | Moderation | ||
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mathew | "One confounding issue is where the card goes in library shipment. I'm looking at foam-lined reusable boxes we can package everything easily and mi..." | Read more » | over 9 years ago | |||
warren | "OK, cool - i agree vertical orientation will probably work better, and OK, going to go for a letter-sized sheet; Nick, could you try to select fina..." | Read more » | over 9 years ago | |||
mathew | "we should check the accuracy of the digital thermometer-- sometimes they give 3 sig figs but actually only do 2. if we switched to a vertical orie..." | Read more » | over 9 years ago | |||
nshapiro | " There we go! working now. " | Read more » | over 9 years ago | |||
nshapiro | "Hey Jeff, The card mock up is 5x8. The alcohol thermo and humidity meter is 9x 2.5 at its thickest point. I have 2 inch diameter coil spring humid..." | Read more » | over 9 years ago | |||
warren | "Hey Nick - can you post the dimensions, or just a photo of the thermometers you have with a ruler in the photo? " | Read more » | over 9 years ago | |||
danbeavers | "I did not think about measuring the AC duty cycle. I think the most influential observation was the front door being open 8 to 10 inches. By the ..." | Read more » | over 9 years ago | |||
nshapiro | "@danbeavers do you know the duty cycle of the AC when you did the follow up testing? " | Read more » | over 9 years ago | |||
nshapiro | "we would probably want 1 degree accuracy as the visual read out of the tube has to be multiplied by a temperature coefficient on a 1 degree scale. ..." | Read more » | over 9 years ago | |||
nshapiro | " Here is what the thermo and humidity meter look like next to the card. We could still use an alcohol thermo, this one is just a bit clunky. Also ..." | Read more » | over 9 years ago | |||
danbeavers | "Oh, I was making assumptions. I had not seen a pump that was set up to have 2 different attach points. So never mind about my comment! " | Read more » | over 9 years ago | |||
nshapiro | "@danbeavers were you using the whisper pump or another pump? I think the whisper pump can handle one pump and one vacuum if need be " | Read more » | over 9 years ago | |||
mathew | "I'm seeing 2-degree accuracy on some of those strips. are they cheaper than an alcohol thermometer? do they photograph better? buy some and lets s..." | Read more » | over 9 years ago | |||
warren | "What about a thermochromic temperature strip adhered to the card? https://www.google.com/search?tbm=shop&q=thermochromic+thermometer&gws_rd..." | Read more » | over 9 years ago | |||
danbeavers | "On reversing the aquarium pump: Be sure and reverse both diaphragms! " | Read more » | over 9 years ago | |||
nshapiro | "@mathew I just ordered the temp/humidity meter you recommended. In terms of design maybe it can fit horizontally under the A, B, C columns? " | Read more » | over 9 years ago | |||
nshapiro | "Sorry for the slow reply! I think my spam filter may have been hoarding emails from PL. The color changes from a waxy yellowish orange to pink and..." | Read more » | over 9 years ago | |||
mathew | "We were talking about relative humidity being important (but accuracy not being a big deal) so including not just a thermometer but also a hygromet..." | Read more » | over 9 years ago | |||
warren | "Good questions Bryan. @nshapiro, I'd put those black boxes along the top of my sketch to provide color balance help, but Bryan's right; the tube it..." | Read more » | over 9 years ago | |||
btbonval | "Secondary thought: Is the gradient blue and black, or white and gold? lulz " | Read more » | over 9 years ago | |||
btbonval | "What about color and white balance? Your example image shows an awfully strong red/yellow back light which will change hue of the colorimeter. It..." | Read more » | over 9 years ago | |||
warren | "Hi, Nick - I'm working on some sketches of the kit; do you have any photos of the entire thing, just a bit more zoomed out? Thanks! " | Read more » | over 9 years ago | |||
mathew | "I just bought the air pump components and a graduated cylinder to try and compare @davidmack's cheapo air meter... can't wait. I'm going to try us..." | Read more » | over 9 years ago | |||
nshapiro | "I think so. Those tubes require one pump on the Draeger Tube proprietary pump. So if one were to rent their proprietary pump for a single day and a..." | Read more » | about 10 years ago |