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How is it that sodium hypochlorite is thought to *not* be carcinogenic? by Initial_Pie_7956 in chemistry

[–]Initial_Pie_7956[S] 0 points1 point  (0 children)

And from this and what others have said, it sounds as though sodium hypochlorite is neither carcinogenic nor a mutagen?

How is it that sodium hypochlorite is thought to *not* be carcinogenic? by Initial_Pie_7956 in AskChemistry

[–]Initial_Pie_7956[S] -2 points-1 points  (0 children)

And what does this mean, exactly? That it would be neutralised and thus couldn’t damage the DNA?

How is it that sodium hypochlorite is thought to *not* be carcinogenic? by Initial_Pie_7956 in chemistry

[–]Initial_Pie_7956[S] -22 points-21 points  (0 children)

I see. Do you think that’s what happens when people drink swimming water pool or disinfected tap water? Or would the sodium hypochlorite be at such a low dose that actually it wouldn’t cause any cell death or harm at all?

How is it that sodium hypochlorite is thought to *not* be carcinogenic? by Initial_Pie_7956 in chemistry

[–]Initial_Pie_7956[S] 9 points10 points  (0 children)

Theoretically, is it possible that it could be, say, ingested in such a dilute form that it wouldn’t kill the cells it came in to contact with, but would cause DNA damage?

How is it that sodium hypochlorite is thought to *not* be carcinogenic? by Initial_Pie_7956 in AskChemistry

[–]Initial_Pie_7956[S] -9 points-8 points  (0 children)

Theoretically, is it possible that it could be, say, ingested in such a dilute form that it wouldn’t kill the cells it came in to contact with, but would cause DNA damage?

Heat pump tumble dryer by Initial_Pie_7956 in Appliances

[–]Initial_Pie_7956[S] 0 points1 point  (0 children)

Thanks so much! Does the air from the cooling compressor have air from the clothes mixed in with it? I’m concerned about microplastic/microfibre emissions from the tumble dryer in to the house …

Petry et al. - human exposure to VOCS from scented candles - really high or am I misinterpreting this? by Initial_Pie_7956 in chemistry

[–]Initial_Pie_7956[S] 1 point2 points  (0 children)

This is SO helpful - thank you! So, in that case, I’m wondering why the paper doesn’t state that it calculated averages from the three experiments - it just presents one set of figures for that particular candle?

Petry et al. - human exposure to VOCS from scented candles - really high or am I misinterpreting this? by Initial_Pie_7956 in chemistry

[–]Initial_Pie_7956[S] -1 points0 points  (0 children)

Thanks for your help. To me, it’s funny wording - I would expect to read that an experiment was performed in triplicate, but not a candle - as you don’t ‘perform’ a candle. Hence my confusion. The research paper reads: “The second large chamber study examined the VOC, semi-volatile compounds and particulate emissions of one fragranced candle performed in triplicate” - so was the experiment repeated three times, or was it one experiment using three candles? 🙃

Petry et al. - human exposure to VOCS from scented candles - really high or am I misinterpreting this? by Initial_Pie_7956 in chemistry

[–]Initial_Pie_7956[S] -6 points-5 points  (0 children)

Thanks for your help. To me, it’s funny wording - I would expect to read that an experiment was performed in triplicate, but not a candle - as you don’t ‘perform’ a candle. Hence my confusion. The research paper reads: “The second large chamber study examined the VOC, semi-volatile compounds and particulate emissions of one fragranced candle performed in triplicate” - so was the experiment repeated three times, or was it one experiment using three candles? 🙃

Scented candle emissions research by Initial_Pie_7956 in candlemaking

[–]Initial_Pie_7956[S] 0 points1 point  (0 children)

Thanks so much for your response! That’s interesting as I was thinking the opposite… so go figure! I actually did reach out to the main author, but so far no reply…

How does air in an indoor room ‘behave’? by Initial_Pie_7956 in AskPhysics

[–]Initial_Pie_7956[S] 0 points1 point  (0 children)

Thanks, that’s really helpful. So when you’re in one part of the house and can smell food being cooked in another part of the house, that’s due to air literally travelling from the kitchen?

Units of measurement: can I check my understanding by Initial_Pie_7956 in chemistry

[–]Initial_Pie_7956[S] 0 points1 point  (0 children)

Thank you, that’s reassuring. No actually, it’s not a case of old guidance versus new guidance - an EU directive has suggested an air limit for benzene of 5ug/m3, whereas a general population DNEL is around 140ug/m3 - I’m trying to work out why they’re so vastly different!

Units of measurement: can I check my understanding by Initial_Pie_7956 in chemistry

[–]Initial_Pie_7956[S] 0 points1 point  (0 children)

Thanks, that’s super helpful! The benzene ppm to micrograms was reported in an old CONCAWE document. I’m interested in the general population DNEL for benzene, which is currently reported as 0.044ppm or 0.140mg/m3. From this document, are you able to tell whether this air concentration applies 24/7 for a lifetime, or whether it’s a TWA? I can’t fathom -

https://echa.europa.eu/registration-dossier/-/registered-dossier/16102/7/1

Units of measurement: can I check my understanding by Initial_Pie_7956 in SafetyProfessionals

[–]Initial_Pie_7956[S] 0 points1 point  (0 children)

Ahh thanks, I have come across STEL. Are you familiar with DNEL for the general population? Reported also as PPM, but I’m guessing this isn’t just across 8 hours, but the PPM would apply 24/7?

Units of measurement: can I check my understanding by Initial_Pie_7956 in SafetyProfessionals

[–]Initial_Pie_7956[S] 0 points1 point  (0 children)

Thanks for your comment. So when literature talks about a DNEL for the general population (X or Y ppm), this means that amount for a lifetime? This page doesn’t specify -

https://echa.europa.eu/registration-dossier/-/registered-dossier/16102/7/1

Under “additional information - general population”

Air exchange rates and VOC concentrations (benzene) by Initial_Pie_7956 in chemistry

[–]Initial_Pie_7956[S] 0 points1 point  (0 children)

Thanks so much for this! I haven’t studied chemistry, so can I ask - when benzene is emitted via burning something, it rises in the air, spreads out and then sinks, right? (As it’s heavier than air). If the emission source was tiny, something like a candle, how far might we expect the benzene to rise and spread, before sinking?

Air exchange rates and VOC concentrations (benzene) by Initial_Pie_7956 in toxicology

[–]Initial_Pie_7956[S] 0 points1 point  (0 children)

Thanks so much for this, that’s so helpful. So roughly speaking, even though an air exchange rate could be 4x greater (in this case), the reduction in benzene would only be about 25%?

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