CERTIFICATE OF QUALITY

Product:

Tris Base

Tris(hydroxymethyl)-aminomethane

Grade:

Ultra Pure Grade

Lot:

OG0501A

Code:

183995

CAS-No:

[77-86-1]

Mol. Formula:

C4H11NO3

Mol. Weight:

121.14

Packing:

25 Kg / Drum

  Purity

99.9~100.1%

99.9%

  Solubility (0.1M, Water)

Clear

Pass

  APHP Color,20% Aqueous solution

<10#

Pass

  Melting point

168.5~171.5℃

170.3℃

  pH-value(5%; water)

10.0~11.5

10.3

  In water insoluble

<0.005%

0.004%

  Abs.@280nm; 10%; 1cm; water

<0.03

Pass

  Abs.@260nm; 10%; 1cm; water

<0.02

Pass

  Loss on drying (105℃)

<0.05%

0.04%

  Residue after Ignition

<0.03%

Pass

  Heavy Metals

<0.0005%

Pass

  Chloride (Cl)

<0.0002%

Pass

  Sulfate (SO₄)

<0.0005%

Pass

  As (Arsenic)

<0.0001%

Pass

  Ca (Calcium)

<0.0005%

Pass

  Cu (Copper)

<0.0005%

Pass

  Fe (Iron)

<0.0001%

Pass

  Mg (Magnesium)

<0.0005%

Pass

  Mn (Manganese)

<0.0005%

Pass

  Pb (Lead)

<0.0002%

Pass

  Zn (Zinc)

<0.0005%

Pass

  Appearance

White, odorless crystals

White crystalline powder