离岸价格
获取最新报价|
20 Metric Ton Minimum Order
国家:
South Africa
型号:
afexpo-819
离岸价格:
位置:
South Africa
最小订单价格:
-
最小订单:
20 Metric Ton
包装细节:
In 25 HDPE bags with liners or 50 kg MS or HDPE drums with liners; 25kgs net new plastic woven bag1x
交货时间:
17 - 30 days
供应能力:
900 Metric Ton per Month
付款方式:
T/T, L/C, D/A, Western Union, PayPal
產品組 :
South Africa
联系人 Mali
188 Eloff Street, Johannesburg, Gauteng
Boric Acid BP
MF H3BO3 *- M.wt *1.8 *- CAS# *********3
Boric Acid BP
DEFINITION
Boric acid contains not less than *9.0 per cent and not more than
the equivalent of **0.5 percent of H3BO3.
CHARACTERS
A white, crystalline powder, colourless, shiny plates greasy to
the touch, or white crystals, soluble in water and in
alcohol, freely soluble in boiling water and in glycerol
(*5 per cent).
IDENTIFICATION
A. Dissolve 0.1 g by gently heating in 5 ml of methanol, add 0.1
ml of sulphuric acid and ignite the solution. The flame has a
green border.
B. Solution S (see Tests) is acid.
TESTS
Solution S
Dissolve 3.3 g in *0 ml of boiling distilled water, cool and
dilute to **0 ml with carbon dioxide-free water prepared
from distilled water.
Appearance of solution
Solution S is clear and colourless.
pH
The pH of solution S is 3.8 to 4.8.
Solubility in alcohol
Dissolve 1.0 g in *0 ml of boiling alcohol. The solution is not
more opalescent than reference suspension and is colourless.
Organic matter
It does not darken on progressive heating to dull redness.
Sulphates
*0 ml of solution S diluted to *5 ml with distilled water
complies with the limit test for sulphates (**0 ppm).
Heavy metals
*2 ml of solution S complies with limit test A for heavy metals
(*5 ppm).
Boric Acid USP NF
H3BO3 *- *1.*3
Boric acid USP-NF (H3BO3) [*********3].
Boric Acid contains not less than *9.5 percent and not more than **0.5 percent of H3BO3, calculated on the dried basis.
Solubility in alcohol— One g dissolves completely in *0 mL
of boiling alcohol.
Completeness of solution— One g dissolves in *5 mL of
water, producing a clear solution.
Identification— It responds to the tests for Borate.
Loss on drying— Dry it over silica gel for 5 hours: it
loses not more than 0.5% of its weight.
Heavy metals— Dissolve 1 g in *3 mL of water, and add 2 mL
of 1 N acetic acid: the limit is 0.**2%.
ACS Specifications
American Chemical Society
Boric Acid ACS Analytical Reagent
H3BO3
Formula Wt *1.*3
CAS Number *********3
REQUIREMENTS
Assay: *9.5% H3BO3
MAXIMUM ALLOWABLE
Insoluble in methanol .......... 0.**5%
Nonvolatile with methanol ... 0.*5%
Chloride (Cl) ...................... 0.**1%
Phosphate (PO4) ................ 0.**1%
Sulfate (SO4) ..................... 0.*1%
Calcium (Ca) ..................... 0.**5%
Heavy metals (as Pb) ......... 0.**1%
Iron (Fe) ........................... 0.**1%
| 国家: | South Africa |
| 型号: | afexpo-819 |
| 离岸价格: | 获取最新报价 |
| 位置: | South Africa |
| 最小订单价格: | - |
| 最小订单: | 20 Metric Ton |
| 包装细节: | In 25 HDPE bags with liners or 50 kg MS or HDPE drums with liners; 25kgs net new plastic woven bag1x |
| 交货时间: | 17 - 30 days |
| 供应能力: | 900 Metric Ton per Month |
| 付款方式: | T/T, L/C, D/A, Western Union, PayPal |
| 產品組 : | Inorganic Chemicals |
