DETAILS ON SILICA GEL

Desiccant Silica Gel is an amorphous form of Silicon-di-oxide; Silica Gel is an inorganic chemical. It function is to adsorb moisture from the air. Silica Gel is free from any toxic chemical, heavy metal, DMF, PCP.
 

Silica Gel is free from any toxic chemical,heavy metal,DMF,PCP.

Chemical Analysis Report for White Silica Gel

SiO2 – 98%
H2O – 2%
Chloride – 0.02%
Cobalt chloride - nil

Bulk Density:650 to 750 gram per litre.
Moisture adsorption at 100% RH. & at 25 Degree Centigrade: 30 to 35%

Chemical Analysis Report for Blue Silica Gel

SiO2 – 98%
H2O – 2%
Chloride – 0.02%
Cobalt chloride – 0.25%

Bulk Density:650 to 750 gram per litre.
Moisture Adsorption at 100% RH. & at 25 Degree Centigrade: 30 to 35%

SECTION 1: CHEMICAL PRODUCT AND COMPANY IDENTIFICATION

Product name Silica Gel white and blue IS specification: 3401.

Cas : N.A.
Rtecs : N.A.
Tsca : N.A.
Ci : N.A.

Synonym : Silica Gel-Amorphous, Gel –Amorphous Silicon dioxide; Silicic acid; Silica Gel white. Synthetic Amorphous Silica not to be confused with crystalline Silica Gel such as quartz, cristobalite or tridymite or with diatomaceous earth or other naturally occurring forms of Amorphous Silica that frequently contain crystalline forms.

Chemical name : Synthetic Amorphous Silica.
Chemical formula : SiO2.xH20

SECTION 2: COMPOSITION AND INFORMATION ON INGREDIENTS

Composition : name Silica Gel white and blue by weight 0.5 gm. to 1000 gm.
Toxicological data on ingredients : N.A.

SECTION 3: HAZARDS IDENTIFICATION

Potential acute health effects : no hazardous in case of skin contact(irritant),slightly hazardous of eye contact(irritant),of ingestion of inhalation.
Potential chronic health effects : Carcinogenic effects : 3(not classifiable for human) by IARC.

Mutagenic effects : N.A.
Teratogenic effets : N.A.
Developmental toxicity : N.A.
Repeated or prolonged exposure is not known to aggravate medical condition.

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 emollient.Get medical attention if irritation develops.
serious skin contact : N.A
Ihhalation :If inhaled,remove to fresh air.if not breathing,Give artifical respiration.If breathing is dificult,give oxygen.get medical attention.
Serious inhalation : N.A.
Ingestion : Do not induce vomiting unless directed to do so by medical personnal.never give anything by mouth to an unconscious person.loosen tight clothing such as collar,tie,belt or waistband.get medical attention if symptoms appear.
Serious ingestion : N.A.

SECTION 5 : FIRE AND EXPLOSION DATA

Flammability of the product : non-flammable.
Auto-ignition temperature : N.A.
Flash points : N.A.
Flammable limits : N.A.
Products of combustion : N.A.
Fire hazards in presence of various substances : N.A.
Explosion hazards in presence of various substances : Risks of explosion of the product in presence of mechanical impact : N.A.
Ricks of explosion of the product in presence of static discharge : N.A.
Fire fighting media and instructions : N.A.
Special remarks on fire hazards : N.A.
Special remarks on explosion hazards : substance can explode when wet and heated with magnesium.

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SECTION 6 : ACCIDENTAL RELEASE MEASURES

Small spill : Use appropriate tools to put the spilled solid 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.be careful that the product is not present at a concentration level above tlv.check tlv on the msds and with local authorities.

SECTION 7 : HANDLING AND STORAGE

Precaution : Do not breathe dust.if ingested,seek medical advice immediately and show the container or the label.

Storage : hygroscopic.keep container tightly closed.keep container in a cool,well ventilated area.do not store above 23 degree centigrade(73.4 degree F)

SECTION 8 : EXPOSURE CONTROLS/PERSIONAL 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 approval/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.suggested protective clothing might not be sufficient;consult a speicalist before handling this product.

Exposure limits : TWA : 6(mg/m3)(Canada),TWA : 10(mg/m3) from ACGIH(TLV)(U.S.) consult local authorities for acceptable exposure limits.

SECTION 9 : PHYSICAL AND CHEMICAL PROPERTIES

Physical state and appearance : Solid(granular solid,beads solid)
Odor : Odorless.
Taste : Tasteless.
Molecular weight : 60.09 + XH2O g/mole.
Color : White.
PH(1% Soln/water) : N.A.
Boiling point : N.A.
Melting point : N.A.
Critical temperature : N.A.
Specific gravity : 2.1(water=1)
Vapor pressure : N.A.
Vapor density : N.A.
Volatility ; N.A.
Odor threshold : N.A.
Water/oil dist.coeff : N.A.
Ionicity (in water ) : N.A.
Dispersion properties : N.A.

Solubility : Insoluble in cold water soluble in hot KOH and MAOH solutions. insoluble in ethanol, insoluble in acids except hydrofluoric acid.

SECTION 10 : STABILITY AND REACTIVITY DATA

Stability : the product is stable.
Instability temperature : N.A.. Conditions of instability : Incompatible materials,moisture,excess dust generation.
Incompatibility with various substance : N.A..
Corrosivity : non-corrosive in presence of glass.
Special remarks on reactivity : Hygroscopic.incompatible with hydrogen fluoride,zenon hexafluoride,oxygen difluoride,and chlorine trifluoride.
Special remarks on corrosivity : N.A.
Poymerization : will not occur.

SECTION 11 : TOXICOLOGICAL INFORMATION

Route of entry : inhalation ingestion.
Toxicity to animals: acute oral toxicity(ld50):>31600mg/kg(rat this data from a 48 hr. oral test for dot hazard classification conducted with finely-ground silica gel) acute dermal toxicity(ld50) :>2000mg/kg (rabbit. this is data from a 48 hr. dermal test for dot hazard classification conducted with finely-ground silica gel)

Chronic effecs on humans : Carcinogenic effects : 3(not classifiable for human) by IARC.
Other toxic effects on humans : Slightly hazardous in case of skin contact(irritant),of ingestion,of inhalation.
Special remarks on toxicity to animals : N.A.
Special remarks on chronic effects on humans : N.A.
Special remarks on other toxic effects on humans : Acute potential health effects :skin : may cause irration with dryness of the skin in cases of severe exposure.
Eyes : no adverse effects expected,but dust may cause mechanical irritation.
Silica gel is a synethic amorphous silica,not to be confused with crystalline silica such as quartz,xristobalite,or tridymite or with diatomaceous earth or other naturally occuring forms of amorphous silica that frequently contain crystalline forms.epidemiological studies indicate a low potential for health effects.
Inhalation : may cause dryness and irritation to mucous membranes and repiratory tract in case of severe exposure.
Ingesion : may be harmful if swallowed in large amounts.however,no adverse effects are expected for numeral industrial handling.

SECTION 12 : ECOLOGICAL INFORMATION

Ecotoxicity : N.A.
Bod5 and cod : N.A.
Products of biodegration : Possibly hazardous short term degradation products are not likely.however,long term degradation products may arise.
Toxicity of the products of biodegradation : The product itself and its products of degradation are not toxic.
Special remarks on the products of biodegradation : N.A..

SECTION 13 : DISPOSAL CONSIDERATIONS

Waste disposal : Waste must be disposed of in accordance with federal,state and local environmental control regulations.

SECTION 14 : TRANSPORT INFORMATION

Dot classification : Not a dot controlled material (U.S.)
Identification : N.A.
Special provisions for transport : N.A.

SECTION 15 : OTHER REGULATORY INFORMATION

Federal and state regulations:minnesote:silica
massachusetts rtk : silica
TSCA 89b) inventory : silica
Other regulations :Einecs:this product is on the European investory of existing commercial chemical substances.
Other classifications:
WHMIS(Canada): Not controlled
DSCI(ees) : This product is not classified according to the EU regulations.N.A.

HMIS(U.S.A.) :
Health hazard:1
Fire hazard : 0
Reactivity : 0
Personal protection : e
National fire protection association (usa)
Health : 1
Flammability : 0
Reactivity :0
Specific hazard :
Protective equipment :Gloves,lab coat.dust respirator.be sure to use an approved/certified respirator or equivalent.safety glasses

SECTION 16 : OTHER INFORMATION

Reference : N.A.
Other special consideration : N.A.
Created: 2008
lasted updated: 2008

This formation above is believed to be accurate and represents the best information currently available to us.however,We make no warranty of merchantability or any other warrant,express or implied,with respect to such information,and we assume no liability resulting from its use.users should make their own investigations to determine the suitability of the information for their particular purposes.in no event shall sciencelab.com be liable for any claims,losses, or damages of any third party or for lost profits or any special,indirect,incidental,sonsequential or exemplary damages,howoever arising,even if sciencelab.com has been advised of the possibility of such damages.

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TESTING METHOD OF SILICA GEL

  1. 1. Silica Gel should have moisture loss of 6-10% in bag packing. we take every care at our end to pack fully activated Silica Gel.
  2. 2. The bulk density of Silica Gel should be round about 600-650 gm/litre after activation
  3. 3. In a Desiccator put water below and a weighted quantity of Silica Gel as supplied. Put in a container be placed inside over the platform as quickly as possible and close the desiccator. The gain in weight of Silica Gel within 90 days should be minimum 25-30%.

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SILICA GEL FOR LEATHER SECTOR

Fungus formation on leather articles and its prevention

1. Why fungus forms on leather.

Leather articles contains its own moisture and also hygroscopic due to which they tends to absorb moisture. if moisture content exceeds certain limit increased microbial activity starts. Thereby mold, mildew and fungi etc. start forming.

2. Damage due to fungus.

  • Decomposition of leather.
  • Mechanical weakening of leather.
  • Sheen of leather destroyed and its disfigures.
  • Bad smell.
  • The fungus also has health hazards on human beings of bacterial infection.
  • Sheen of leather destroyed and its disfigures.
  • Rejection of leather consignment and losses.

3. Criteria of fungus prevention.

Experiment are shown that if initial moisture content in leather is around 10% and if it is stored in proper dehumidified condition of 40-45% RH then fungus formation can be prevented. Silica Gel is a product which adsorbs moisture and is widely used in packing of leather articles to attain such dehumidified conditions.

4. Solution for fungus prevention.

  • First of all it should be ensured that leather articles should not be contain more than appx. 10% moisture.
  • Then leather articles are to be packed with silica gel pouches according to their sizes and packing instructions are to be strictly followed properly which is given below
  • If initial moisture content in leather is more than desired level more silica gel pouches should be used so that it can adsorb excess moisture.
  • Purpose of use of silica gel is to adsorb moisture from surrounding air so that atmosphere around leather articles is dehumidified so that fungus is not allowing to form.
  • During rainy season moisture content in air is very high as much as 100% RH and leather articles also contains high percentage of moisture, care must be taken during packing with silica gel pouches without much exposure to the air otherwise moist air will decrease the activity of silica gel. many of the leather goods exporters are using more silica gel during rainy season because of the above factors.

5. Packing Instructions

  • First put the article in an unpunched pp/polythene/plastic bags and make such sufficient number of the article ready.
  • We supply the silica gel pouches in sealed poly packets,open the poly packets and put desired quantity of silica gel pouches immediately with the leather articles.
  • The carton with bigger poly should be ready before hand and the above article so packed as above be put into the bigger poly and close and seal the cartons.

    The idea is to give minimum exposure of our Silica Gel pouches to the air otherwise it will adsorb moisture from the air and its effectiveness will be much reduced.

  • Recommendation of use of Silica Gel with leather articles in dry climate.

    • For wallets and similar size use 1 gm.
    • For article little bigger than wallets use 2 gm.
    • For article of size 8" x 10" use 5 gm.
    • For artiles of size 12" x 15" use 10 gm.
    • For shoes use 2 pcs. of 2 gm.

For further details or clarification please feel free to call us.

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ADVANTAGE OF SILICA GEL IN PAPER POUCHES THAN OTHER PACKING

a) Air permeability

In paper pouches: good. Experimented with blue silica gel after filled in paper pouches turns into pink in colour when exposed to air. In non-woven packets: Very good.

b) Strength of packing material

In paper pouches: good
In non-woven pouches: good

c) Small granules of Silica Gel coming out.

In paper pouches: nil
In non-woven pouches: comes out from the body.

d) Moisture Adsorbtion.

In paper pouches: sustained for longer period thereby more time can be taken for packing.
In non-woven pouches: Fast thereby activity quickly finishes. once you open the poly packet within 20 minutes the activity of Silica Gel finishes that means that the leather articles must be packed within 10/15 minutes. You have to be very cautious in packing.

e) Handling.

In paper pouches:quite easy.
In non-woven pouches: careful.

We hope you have understood the above points.
For further details or clarification please feel free to call us.

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NO BAN ON SILICA GEL SACHETS

EU Ban On Dimethyfumarate (DMF) – Not Silica Gel Sachets

The chemical dimethylfumarate (DMF) (CAS No. 624-49-7) has been used by some producers as a biocide to kill moulds that may cause furniture, shoe leather or other leather products to deteriorate during storage and transportation in a humid climate. A velour toy has also been recalled in France allegedly due to the present of DMF.

Placed in sachets and fixed inside the furniture or added to the footwear boxes or other product packaging, DMF evaporates and impregnates the leather, protecting it from moulds. However, it has been found to affect consumers who were in contact with the products, causing painful skin irritation and in some cases acute respiratory troubles. Therefore the EU Commission have concluded that DMF is hazardous to health and banned any new product containing DMF from entering the market, under Article 13 of the General Product Safety Directive (2001/95/EC).

DMF should not be confused with silica gel (often used in sachets as a desiccant for protecting products from the effects of humidity and damp conditions) which physically absorbs water vapour, produces no chemical reaction, by products or side effects and is therefore considered safe to use.

From 1 May 2009 products containing more than 0.1mg DMF per kg of product or part of the product should not be placed on the market. Products already placed on the market are to be withdrawn and disposed of and recalled from consumers. Consumers are to be informed of the risk posed by such products.

Members are recommended to check with their suppliers that no anti-mould sachets containing DMF are, or have been, included with their products during transit.

 

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