# Online handbook?

## Main Question or Discussion Point

I have a lab report due tomorrow morning and I need to put some infos about the reactants (is this the correct english word?) we used. More precisely, I need to know their boiling point, molar weight, melting point, solubility in water (and ethanol if possible), density of liquids. The reactants I am talking about are Dichloromethane, $$MgSO_4$$, Caffeine( $$C_{8}H_{10}N_{4}O_{2}$$ ), water and NaOH. If somebody could post a link (on a good website) where I could find those informations or just write them from a handbook with the reference it would be very cool. For now I found all the info I need about the caffeine on http://en.wikipedia.org/wiki/Caffeine and http://www.angelo.edu/faculty/kboudrea/molecules/caffeine/caffeine.htm [Broken] but I can't find the properties of other reactants.

Thanks

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Gokul43201
Staff Emeritus
Gold Member
Dichloromethane

Molar Weight : 85 g/mol
Appearance: colourless liquid
Melting point: -97 C
Boiling point: 40 C
Water solubility: slight

MgSO4

Appearance: colourless odourless crystals or white powder
Molar Weight: 120.36 g/mol
Solubility: Very soluble in water. Not in ethanol.
Melting Point: 1124C (2055F)
Boiling Point: Not applicable.

Water

MP : 0 C
BP : 100 C
Molar Weight : 18 g/mol
Solubility : Immiscible with ethanol

NaOH

Appearance: White, deliquescent pellets or flakes.
Molar Weight: 40.00 g/mol
Boiling Point: 1390C (2534F)
Melting Point: 318C (604F)
Solubility: 111 g/100 g of water.

Gokul43201
Staff Emeritus
Gold Member
Usually Googling with "sodium hydroxide msds" or "dichloromethane msds", etc works pretty well.
MSDS stands for materials safety data sheet.

Thanks for the tip! Paper handbook are so outdated...

I found that : "Water Solubility is infinite in alcohols (ethanol, methanol), but negligible in gasoline." here: http://www.greenfuels.org/ethanolterms.html [Broken]
But you wrote it's imiscible in water so I'm a little confused...

I also guess the infos in the MSDS are taken at 0°C ?

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chem_tr
Gold Member
Hello,

I think MSDS is the most reliable information after scientific ones. If you have a library connection, please refer to Combined Chemical Dictionary, a.k.a. ChemNetBase. The information you'll find there will be the best ones.

Regards,
chem_tr

Gokul43201
Staff Emeritus