Elemental Boron

Product Information
Brand Name Trona® Elemental Boron
Chemical Name Elemental boron
Other Name Amorphous boron
Manufacture Location Henderson, Nevada USA
Formula B
Molecular Weight 10.81
CAS Number 7440-42-8
Appearance Fine dark brown powder
B Isotopes Ratio as occuring in nature
Specifications Meets or exceeds the requirements of Specifications OS 11608 and Mil-B-51092


Typical Chemical Analysis
Element Percent Weight
Percent Weight
Boron (net as B) 90 – 91 89.5 – 92.0
Water soluble Boron 0.4 – 0.5 0.52 (max)
Magnesium (Mg) 4.0 – 4.5 5 (max)
Insoluble in H2O2 0.15 – 0.30 1.0 (max)
Moisture 0.05 – 0.30 0.5 (max)

The remaining major impurity is oxygen in solid solution with the Boron.


Other Properties
Property Value
Surface Area (N2 BET) 15 – 25 m2/g n/a
Average Particle Size* 0.6 – 0.8 Microns 1.0 Microns (max)

* By Fischer sub-sieve analyzer. Size specifications based on light-scattering fine particles must be negotiated.


Typical Screen Analysis
U.S. Standard Sieve No. Percent Cumulative
20 10%
40 65%
60 90%
100 97%



Elemental boron is packaged in 5-pound (2-gallon plastic) pails, 25-pound (8-gallon steel) drums, and 50 pound (16gallon steel) drums. Polyethylene liners are used in all containers


Download Safety Data Sheet (SDS):
Information concerning the handling and use of this product is provided in: U.S.(English), Japan, Japan(English) The SDS must be fully read and understood prior to any exposure, handling or use of the product.