| |
 |
 |
|
| L-Threonine |
|
| Chemical Name： |
L-2-Amino-3-hydroxybutyric
acid; |
|
Structure Formula：
|
 |
|
Molecular Formula：
|
C4H9NO3 |
|
Molecular Weight：
|
119.12
|
|
Cas No：
|
[72-19-5] |
|
Characteristics：
|
White crystalline
powder |
|
Quality
Standards：
|
USP24,
FCCIV, AJI97 and etc. |
|
Item
|
Specification
|
|
USP24
|
FCCIV
|
AJI97
|
|
Appearance
|
White
crystals or crystalline powder
|
|
Assay,
%(on dried basis)
|
98.5~101.5
|
98.5~101.5
|
98.5~101.0
|
|
Specific
optical rotation
|
-26.7º~
-29.1º
|
-26.5º~
-29.0º
|
-27.6º~
-29.0º
|
|
Transmittance
|
-
- -
|
-
- -
|
≥98.0
|
|
pH
Value
|
5.0~6.5
|
-
- -
|
5.2~6.2
|
|
Loss
on drying,%
|
≤0.2
|
≤0.3
|
≤0.2
|
|
Heavy
metals (as Pb),%
|
≤0.0015
|
≤0.002
|
≤0.001
|
|
Residue
on ignition,%
|
≤0.4
|
≤0.1
|
≤0.1
|
|
Chloride
(as Cl),%
|
≤0.05
|
-
- -
|
≤0.02
|
|
Sulfate
(as SO4),%
|
≤0.03
|
-
- -
|
≤0.02
|
|
Ammonium
(as NH4),%
|
-
- -
|
-
- -
|
≤0.02
|
|
Arsenic
(as As),%
|
≤0.00015
|
≤0.00015
|
≤0.0001
|
|
Iron,%
|
≤0.003
|
-
- -
|
≤0.001
|
|
Other
amino acids
|
-
- -
|
-
- -
|
Not
detd.
|
|
Organic
volatile impurities
|
Meets
the requirement
|
-
- -
|
Meets
the requirement
|
|
|
The
Characteristics and Uses：
|
|
|
Package
and Transport：
|
With round paperboard
drum 25kgs per drum. |
|
Storage：
|
Kept in a light-proof,
well-closed, dry and cool place. |
|
|
|
|
|
