1.08382
GR TRIS (hydroxymethyl)aminomethane
Buffer Substance
For general questions please contact our Customer Service:
EMD Millipore
290 Concord Road
01821 Billerica, MA
United States
Phone: 781 533-6000
Fax: +49 6151 72 2000
E-mail: Customer.CareDesk@emdchemicals.com
25 May 2012
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| Product information | |||
|---|---|---|---|
| Synonyms | Tromethamine | ||
| Chemical formula | NH2C(CH2OH)3 | ||
| Molar mass | 121.14 | ||
| CAS number | 77-86-1 | ||
| Chemical and physical data | |||
|---|---|---|---|
| Molar mass | 121.14 | ||
| Specifications | |
|---|---|
| Assay | 99.8-100.1% |
| Absorbance at 260nm, 10%, 1 cm, water | 0.02A max |
| Absorbance at 280 nm, 10%, 1 cm, water | 0.02A max |
| Absorbance at 290 nm, 40% 1 cm, water | 0.1A max |
| Absorbance at 300 nm, 10%, 1 cm, water | 0.02A max |
| Absorbance at 405 nm, 10%, 1 cm, water | 0.004A max |
| Absorbance at 430 nm, 10%, 1 cm, water | 0.004A max |
| Appearance of solution (5%, water) | Conforms |
| Arsenic (As) | 0.00002% max |
| Cadmium (Cd) | 0.00001% max |
| Calcium (Ca) | 0.0001% max |
| Chloride (Cl) | 0.0005% max |
| Copper (Cu) | 0.00001% max |
| Filter sample (0.45 µm) | Passes test |
| Heavy metals (as Pb) | 0.0005% max |
| Identity | Conforms |
| Insoluble in water | 0.003% max |
| Iron (Fe) | 0.00002% max |
| Lead (Pb) | 0.00001% max |
| Loss on drying (105°C) | 0.5% max |
| Magnesium (Mg) | 0.00003% max |
| Melting point | 169-172°C |
| pH (5%, water) | 10.3-10.9 |
| Potassium (K) | 0.00003% max |
| Related substances (TLC) | Conforms |
| Sodium (Na) | 0.0001% max |
| Sulfate (SO4) | 0.0005% max |
| Sulfated ash | 0.01% max |
| Water | 0.1% max |
| Zinc (Zn) | 0.00001% max |
