USD $6.00-9.00 / Gram
USD $5.00-10.00 / Gram
USD $6.00-9.00 / Gram
USD $6.00-9.00 / Gram
USD $5.00-10.00 / Gram
USD $6.00-9.00 / Gram
USD $5.00-10.00 / Gram
USD $5.00-10.00 / Gram
USD $5.00-10.00 / Gram
item |
specification |
appearance |
white or almost white powder |
identification |
meets the requirements |
specific rotation |
-0.10 ~ +0.10° |
water |
≤0.5% |
heavy metals |
≤0.002% |
redidue in ignition |
≤0.2% |
related substances |
meets the requirements |
benzene sulfonic acid |
27.3 ~ 28.7% |
ethanol |
≤300ppm |
toluene |
≤60ppm |
benzene |
≤2ppm |
acetic acid |
≤600ppm |
methylamine |
≤20ppm |
ethyl benzene sulfonate |
≤5ppm |
particle size |
meets the requirements |
assay |
98.0 ~102.0% |
standard |
usp33 |