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L-SELENOMETHIONINE

ITEM	SPECIFICATION
Identification	Positive for Se
Appearance	White crystalline powder
Loss on Drying	NMT 7.0%
pH	6 - 8.5
Particle Size	100.0% through 60 Mesh NLT 90.0% through 80 Mesh
Se Content	0.5 – 0.75%
DCP Content	NLT 98.0%
Bulk Density	Report Only
Lead	NMT 1 ppm
Arsenic	NMT 1 ppm
Mercury	NMT 1 ppm
MICROBIOLOGY:
Total Plate Count	NMT 3,000 CFU/g
Yeast & Mold	NMT 300 CFU/g
Coliforms	Negative
E. Coli	Negative
Salmonella	Negative /25g
Staph. Aureus	Negative
Pseudomonas aeruginosa	Negative

L-(+)-SELENOMETHIONINE

SPECIFICATIONS

ITEM	SPECIFICATION
Appearance	White to off-white shiny crystalline powder
IR	Conforms to standard
Specific Rotation (20oC, 589 nm, c=1, 1N HCL)	+17 to +19.5o
Melting Range (decomposition)	262 - 267oC
Selenium Content	39.0 – 41.0%
Water	≤0.5%
Assay (non-aq. titr.)	98.0 – 100.5%
Assay (HPLC)	≥97.0%
Arsenic	NMT 1 ppm
Cadmium	NMT 1 ppm
Mercury	NMT 0.1 ppm
Lead	NMT 3 ppm
Shelf Life	3 years
Storage	Keep in a tightly closed container. Store in a dry area. Keep refrigerated (Store below 4oC)