Database for chemical and physical properties

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Discussion Overview

The discussion revolves around finding reliable online databases for chemical and physical properties of common substances, including heat capacity, enthalpy of formation, and boiling points. Participants share various resources and express their experiences with the availability of information.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant suggests using PubChem, noting its connection to NCBI.
  • Another participant questions the comprehensiveness of PubChem, indicating it lacks certain information.
  • A different participant recommends ChemSpider as a potential alternative, but also expresses dissatisfaction with its information depth.
  • Some participants mention that many of the best databases are behind paywalls, which limits access to detailed information.
  • Participants share links to NIST's webbook as a useful resource, with one confirming its utility for their needs.
  • There are mentions of specific substances like potassium bicarbonate, with varying reports on the availability of detailed properties across different websites.
  • One participant highlights that while some sites provide background information, they may not include the specific data being sought.

Areas of Agreement / Disagreement

Participants express a general consensus that finding comprehensive information on common substances can be challenging, with multiple competing views on the adequacy of suggested resources. The discussion remains unresolved regarding the best source for the desired information.

Contextual Notes

Some participants note limitations in the databases mentioned, such as missing specific properties like enthalpy of formation and heat capacity. There is also a recognition that the availability of information may vary based on the substance in question.

dRic2
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Do you know any website where I can find chemical and physical properties of common substance (heat capacity, enthalpy of formation, boiling point ecc...)?

Thanks
Ric
 
Chemistry news on Phys.org
Is it me or it does not have very much informations ?
 
dRic2 said:
Is it me or it does not have very much informations ?
This sire might be more what you're looking for:

http://www.chemspider.com/
 
Mhm I found it earlier, but no. It lacks lot of information like enthalpy of formation and heat capacity.

I used to know an amazing website, but I can't remember its name
 
In general best databases are behind a paywall.
 
Borek said:
In general best databases are behind a paywall.

Of course, but I though properties of common substances (i.e. CO2, K2CO3, H2S, HCL, stuff like that) would be easy to find. Wikipedia has a some nice stuff, but I am looking for a little bit more informations.
 
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TeethWhitener said:

That's the website I used to use, thanks!

But I think KHCO3 is not that common after all :confused: guess I'll have to go to the library...
 
  • #10
https://pubchem.ncbi.nlm.nih.gov/compound/Potassium_bicarbonate#section=Top
That site has a lot of information, just not what you are looking for. :cry:
Melting Point: Decomposes before melting

http://www.sciencelab.com/msds.php?msdsId=9927398
All it says is "irritant", "avoid contact", "wear respiratory equipment", and CAS# 298-14-6

http://www.chemicalbook.com/CASEN_298-14-6.htm
Plenty of background info. Melting Point 292C

https://www.scbt.com/scbt/product/potassium-bicarbonate-298-14-6
Their MSDS shows:
Melting: 100C
Boiling: 333.6C
Flash Point: 169.8C
Pay attention to MSDS section 11. TOXICOLOGICAL INFORMATION

Many more if you search on the CAS 298-14-6, just not the info you are looking for.

Good Luck!
 
  • #11
Tom.G said:
just not the info you are looking for.

exactly. Well, I can't do much about it...
 

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