Useful links
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Chemistry Websites
| Pharmaceutical Department | Website |
|---|---|
| Warner Babcock Institute of Green Chemistry, USA | www.warnerbabcock.com |
| Center for Green Chemistry & Green Engineering, Yale University, USA | www.greenchemistry.yale.edu |
| Green Chemistry Network Center (GCNC) | www.gcnc.in |
| Canadian Green Chemistry Network | www.greenchemistry.ca |
| Environmental Chemistry | www.environmentalchemistry.com |
| EPA Green Chemistry Program | www.epa.gov/greenchemistry |
| American Chemical Society - Green Chemistry Institute | www.acs.org |
| Green Chemistry Network | www.rsc.org/Membership/Networking/GCN |
| Greener Education Materials for Chemists | www.uoregon.edu |
| Royal Chemical Society, UK | www.rsc.org |
| Department Science & Technology, Govt. of India (Green Chemistry Task Force) | www.dst.gov.in/about_us/ar04-05chemical.htm |
| International Green Chemistry World | www.industrialgreenchem.com |
Basic SI Units
| Physical Dimension | Symbol for Quantity | SI Symbol | Name of SI Units |
|---|---|---|---|
| Length | l | m | meter |
| Mass | m | kg | kilogram |
| Time | t | s | second |
| Electric current | I | A | ampere |
| Thermodynamic temperature | T | K | Kelvin |
| Amount of substance | n | Mole | mole |
| Luminous intensity | Iv | cd | candela |
Physical Constants
| Quantity | Symbol | Traditional Units | SI Units |
|---|---|---|---|
| Acceleration of gravity | g | 980.6 cm/s | 9.806 m/s |
| Atomic mass unit (1/12th of the mass of 12C atom) | amu | 1.6606 X 10-24 g | 1.6606 X 10-27 kg |
| Avogadro constant | Na | 6.022 X 1023 particles/mol | 6.022 X 1023 particles/mol |
| Boltzmann constant | k | 1.3807 X10-16 erg/K | 1.3807 X 10-23 J/K |
| Charge-to-mass ratio of electron | e/m | 1.7588 X 108 Coulomb/g | 1.7588 X 1011 C/kg |
| Electronic charge | e | 1.60219 X 10-19 Coulomb 4.8033 X 10-19 esu | 1.60219 X 10-19 C |
| Faraday constant | F | 96,487 C·eq-1 | 96,487 C·mol-1 |
| Gas constant | R | 1.987 cal/mol. K | 8.3145 kPa dm3/ mol .K 8.3145 J/ mol.K |
| Molar volume (STP) | Vm | 22.710981 L/mol | 22.710981 X 10-3 m3/mol 22.710981 dm3/ mol |
Prefix used in SI System
| Multiple | Prefix | Symbol |
|---|---|---|
| 10-15 | Femto | f |
| 10-12 | Pico | p |
| 10-9 | Nano | n |
| 10-6 | Micro | µ |
| 10-3 | Milli | m |
| 10-2 | Centi | c |
| 10-1 | Deci | d |
| 10 | Deca | da |
| 102 | Hecta | h |
| 103 | Kilo | k |
| 106 | Mega | M |
| 109 | Giga | G |
| 1012 | Tera | T |
| 1015 | Peta | P |
Concentrations
| Percentage (%) | Part per Million (ppm) | Part per Billion (ppb) | Part per Trillion (ppt) |
|---|---|---|---|
| 1 | 10,000 | 10,000,000 | 10,000,000,000 |
| 0.1 | 1,000 | 1,000,000 | 1,000,000,000 |
| 0.0001 | 1 | 1,000 | 1,000,000 |
| 0.0000001 | 0.001 | 1 | 1,000 |
| 0.0000000001 | 0.000001 | 0.001 | 1 |
| 0.0000000000001 | 0.000000001 | 0.000001 | 0.001 |
Common Units of Mass & Weight
| 1 pound = | 453.5924 grams | 0.45359 kilograms | 7000 grains |
| 1 kilogram = | 1000 grams | 2.205 pounds | - |
| 1 gram = | 10 decigrams | 100 centigrams | 1000 milligrams |
| 1 metric ton = | 1000 kilograms | 2204.62 pounds | - |
Common Units of Length
| 1 inch = | 2.54 centimeters | - | - | - |
| 1 mile = | 5280 feet | 1.609 kilometers | 0.3048 meters | - |
| 1 mile = | 5280 feet | 1.609 kilometers | - | - |
| 1 yard = | 36 inches | 0.9144 meter | - | - |
| 1 meter = | 100 centimeters | 39.37 inches | 3.281 feet | 1.094 yards |
| 1 kilometer = | 1000 meter | 1094 yards | 0.6215 mile | - |
| 1 angstrom = | 1.0 X 10-8 centimeter | 0.10 nanometer | 1.0 X 10-10 meter | - |