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Bentonite BP USP NF EP JP Manufacturers, SDS GHS MSDS Sheet
Bentonite: CAS Number: 1302-78-9, EINECS EC Number: 215-108-5, Molecular Formula: ---, Molecular Weight: ---, HS Code ---**
For SDS MSDS Sheet Click
SDS MSDS Sheet of Bentonite Manufacturers
BP USP NF EP JP Grade
Ph Eur 1302-78-9
Natural clay containing a high proportion of montmorillonite, a native hydrated aluminium silicate in which some aluminium and silicon atoms may be replaced by other atoms such as magnesium and iron.
Appearance: Very fine, homogeneous, greyish-white powder with a more or less yellowish or pinkish tint.
Solubility: Practically insoluble in water and in aqueous solutions. It swells with a little water forming a malleable mass.
A. To 0.5 g in a metal crucible add 1 g of potassium nitrate and 3 g of sodium carbonate and heat until the mixture melts. Allow to cool. To this residue add 20 ml of boiling water, mix and filter. Wash the insoluble residue with 50 ml of water. To this residue add 1 ml of hydrochloric acid and 5 ml of water. Filter. To the filtrate add 1 ml of strong sodium hydroxide solution and filter. To this filtrate add 3 ml of ammonium chloride solution. A gelatinous white precipitate is formed.
B. Swelling power with water (see Tests).
C. 0.25 g gives the reaction of silicates.
Alkalinity: To 2 g add 100 ml of carbon dioxide-free water and shake for 5 min. To 5 ml of this suspension add 0.1 ml of thymolphthalein solution. The liquid becomes bluish. Add 0.1 ml of 0.1 M hydrochloric acid . The liquid is decolourised within 5 min.
Coarse particles: Maximum 0.5 per cent.
To 20 g add 1000 ml of water and mix for 15 min using a high-speed mixer capable of operating at not less than 5000 r/min. Transfer the suspension to a wet sieve (75), tared after drying at 100-105C. Wash with 3 quantities, each of 500 ml, of water, ensuring that any agglomerates have been dispersed. Dry the sieve at 100-105C and weigh. The particles on the sieve weigh a maximum of 0.1 g.
Sedimentation volume: To 6.0 g add 200 ml of water and mix for 20 min using a high-speed mixer capable of operating at 10000 r/min. Transfer 100 ml of this suspension to a graduated cylinder. Allow to stand for 24 h. The volume of the clear supernatant liquid is not greater than 2 ml.
Swelling power with water: Add 2.0 g in 20 portions to 100 ml of a 10 g/l solution of sodium laurilsulfate in a 100 ml graduated cylinder about 30 mm in diameter. Allow 2 min between additions for each portion to settle. Allow to stand for 2 h. The apparent volume of the sediment is not less than 22 ml.
Heavy metals: Maximum 50 ppm.
Loss on drying: Maximum 15 per cent, determined on 1.000 g by drying in an oven at 105C.
Microbial contamination: Total viable aerobic count not more than 103 micro-organisms per gram, determined by plate-count.
Bentonite USP NF
Bentonite is a native, colloidal, hydrated aluminum silicate.
Identification: Add 2 g in small portions to 100 mL of water, with intense agitation. Allow to stand for 12 hours to ensure complete hydration. Place 2 mL of the mixture so obtained on a suitable glass slide, and allow to air-dry at room temperature to produce an oriented film. Place the slide in a vacuum desiccator over a free surface of ethylene glycol. Evacuate the desiccator, and close the stopcock so that the ethylene glycol saturates the desiccator chamber. Allow to stand for 12 hours. Record the Xray diffraction pattern, and calculate the d values: the largest peak corresponds to a d value between 15.0 and 17.2 angstrom units. Prepare a random powder specimen of Bentonite, record the X-ray diffraction pattern, and determine the d values in the region between 1.48 and 1.54 angstrom units: the peak is between 1.492 and 1.504 angstrom units.Microbial limits: It meets the requirements of the test for absence of Escherichia coli.
pH: Disperse 4.0 g in 200 mL of water, mixing vigorously to facilitate wetting. The pH of this suspension is between 9.5 and 10.5.
Loss on drying: Dry it at 105C for 2 hours: it loses between 5.0% and 8.0% of its weight.
Arsenic: limit is 5 ppm.
Gel formation: Mix 6 g with 300 mg of magnesium oxide. Add the mixture, in several divided portions, to 200 mL of water contained in a blender of approximately 500-mL capacity. Blend thoroughly for 5 minutes at high speed, transfer 100 mL of the mixture to a 100-mL graduated cylinder, and allow to remain undisturbed for 24 hours: not more than 2 mL of supernatant appears on the surface.
Swelling power: To 100 mL of water contained in a glass-stoppered cylinder of 100-mL capacity add 2 g in portions, dropping it upon the surface of the water and allowing each portion to settle before adding the next. The mass at the bottom gradually swells until it occupies an apparent volume of not less than 24 mL at the end of a 2-hour period.
Fineness of powder: Sprinkle 2 g upon 20 mL of water contained in a mortar. Allow to swell, disperse evenly with a pestle, and dilute with water to 100 mL. Pour the suspension through a No. 200 standard sieve, and wash the sieve thoroughly with water. No grit is felt when the fingers are rubbed over the wire mesh of the sieve.
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Last 8 August, 2017
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Bentonite SDS MSDS Sheet, Material Safety Data Sheet
Section 1: Chemical Product and Company Identification
Product Name: Bentonite
CAS Number: 1302-78-9
Relevant Uses: Industrial and Laboratory use only.
Supplier: As per letterhead.
Section 2: Hazards Identification
GHS, Globally Harmonized System Classification in accordance with 29 CFR 1910
Classification according to Regulation (EC) No 1272/2008
Not a hazardous substance or mixture according to Regulation (EC) No. 1272/2008.
This substance is not classified as dangerous according to Directive 67/548/EEC.
Labeling according to GHS & Regulation (EC) No 1272/2008
GHS Label Elements
Signal Word: None
P261: Avoid breathing dust/fume/gas/mist/vapors/spray.
P304 + P340 - IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing.
P305 + P351 + P338 - IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P337+313: If eye irritation persists get medical advice/attention.
Section 3: Composition and Information on Ingredients
Product Name: Bentonite
Product Name: Bentonite
CAS Number: 1302-78-9
EINECS EC Number: 215-108-5
% by Weight: 95-100%
Section 4: First Aid Measures
Eye Contact: Check for and remove any contact lenses. In case of contact, immediately flush eyes with plenty of water for at least 15 minutes. Get medical attention if irritation occurs.
Skin Contact: Wash with soap and water. Cover the irritated skin with an emollient. Get medical attention if irritation develops.
Inhalation: If inhaled, remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical attention.
Ingestion: Do NOT induce vomiting unless directed to do so by medical personnel. Never give anything by mouth to an unconscious person. If large quantities of this material are swallowed, call a physician immediately. Loosen tight clothing such as a collar, tie, belt or waistband.
Section 5: Fire and Explosion Data
Flammability of the Product: Non flammable.
Products of Combustion: Aluminum oxide, silicon oxides.
Fire Hazards in Presence of Various Substances: Not available.
Risks of explosion of the product in presence of mechanical impact: Not available.
Fire Fighting Media and Instructions: Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide.
Section 6: Accidental Release Measures
Small Spill: Use appropriate tools to put the spilled material in a convenient waste disposal container. Finish cleaning by spreading water on the contaminated surface and dispose of according to local and regional authority requirements.
Large Spill: Use a shovel to put the material into a convenient waste disposal container. Finish cleaning by spreading water on the contaminated surface and allow to evacuate through the sanitary system.
Section 7: Handling and Storage
Precautions: Keep away from heat. Empty containers may pose a risk. Do not breathe dust. Keep away from incompatibles such as oxidizing agents.
Storage: Keep container tightly closed. Keep container in a cool, well-ventilated area.
Section 8: Exposure Controls/Personal Protection
Engineering Controls: Use process enclosures, local exhaust ventilation, or other engineering controls to keep airborne levels below recommended exposure limits. If user operations generate dust, fume or mist, use ventilation to keep exposure to airborne contaminants below the exposure limit.
Personal Protection: Safety glasses. Lab coat. Dust respirator. Be sure to use an approved/certified respirator or equivalent. Gloves.
Personal Protection in Case of a Large Spill: Splash goggles. Full suit. Dust respirator. Boots. Gloves. A self contained breathing apparatus should be used to avoid inhalation of the product.
Exposure Limits: Contains no substances with occupational exposure limit values.
Section 9: Physical and Chemical Properties
Physical state and appearance: Solid.
Odor: Not available.
Taste: Not available.
Color: Beige or Grayish.
pH (1% soln/water): 6-9.
Melting Point: Not available
Specific Gravity: 2.4
Solubility: Insoluble in cold water, hot water.
Section 10: Stability and Reactivity Data
Stability: It is stable.
Conditions of Instability: Excess heat, incompatible materials.
Incompatibility with various substances: Strong acids.
Special Remarks on Reactivity: Not available.
Polymerization: Will not occur.
Section 11: Toxicological Information
Routes of Entry: Inhalation. Ingestion.
Toxicity to Animals: LD50 Intravenous - rat - 35 mg/kg
Carcinogenicity: No component of this product present at levels greater than or equal to 0.1% is identified as probable, possible or confirmed human carcinogen by IARC.
Section 12: Ecological Information
Toxicity to fish LC50: Oncorhynchus mykiss (rainbow trout) - 19,000 mg/l - 96 h
Products of Biodegradation: Possibly hazardous short term degradation products are not likely. However, long term degradation products may arise.
Section 13: Disposal Considerations
Waste Disposal: Waste must be disposed of in accordance with environmental control regulations.
Section 14: Transport Information
DOT (US) & ADR/RID: Not dangerous goods
IMDG: Not dangerous goods
IATA: Not dangerous goods
Section 15: Other Regulatory Information
USA: SARA 302: No chemicals in this material are subject to the reporting requirements of SARA Title III, Section 302.
SARA 313: This material does not contain any chemical components with known CAS numbers that exceed the threshold (De Minimis) reporting levels established by SARA Title III, Sec: 313.
SARA 311/312 Hazards: Chronic Health Hazard
California Prop. 65 Components: This product does not contain any chemicals known to State of California to cause cancer, birth defects, or any other reproductive harm.
WHMIS (Canada): CLASS D-2A: Material causing other toxic effects (VERY TOXIC).
16. Other InformationDisclaimer:
Our company provides this Bentonite SDS MSDS sheet in good faith but makes no representation as to its comprehensiveness or accuracy. This SDS sheet is intended only as a guide to the appropriate precautionary handling of the material by a properly trained person using this product. The above information has been compiled from various sources and has the possibility of discrepancy and being out-dated information. Individuals receiving the information must exercise their independent judgment and do further search in determining its appropriateness for a particular purpose. In no case shall our company be liable to loss or damages by the product user.