Molecular sieves are crystalline silicates or silicate aluminates formed by connecting sio2 tetrahedron or alumino tetrahedron through oxy-bridge bonds. The size of the molecular sieve (usually 0.3-2.0nm) has the characteristics of screening molecules through the channel and cavity system. Molecular sieve has strong moisture absorption capacity, so it is widely used as a desiccant and used for purification of gases. Direct exposure to air should be avoided when stored.
The molecular sieve is mainly composed of aluminum and silicon connected by an oxygen bridge to form an open skeleton structure. In the structure, there are many holes with uniform pore diameter and well-arranged holes with large surface area. Because the water molecules in the heated continuously losing, but crystal skeleton structure remains the same, has formed many of the same size of the cavity, the cavity has many of the same diameter pores is linked together, these small cavity diameter size uniform, can channel diameter smaller than the molecular adsorption to the interior of the cavity, and the hole bigger than molecular excluded, so the molecules of different diameter size shape, the degree of different polarity molecules, the boiling point of different molecules, degree of saturation of different molecular separation, which have the function of the “screening” molecules, known as molecular sieve. Molecular sieve is widely used in chemical, electronic, petrochemical, natural gas and other industries.
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Remove the Silica Gel Hydrosorbent from its protective packaging. Position the unit on an exposed surface anywhere within the closed area to be protected. For the 200, 450 and 900 gram units, be sure that the end containing the indicator card is on the bottom so that the active ingredients rest on the indicator card. Examine the indicator card from time to time. When the indicator changes from blue to pink, follow the reactivation instructions listed below and included with the unit. After reactivation is complete and the unit is cool enough to handle, return it to the enclosed space. If you leave the unit out in the open, it will rapidly adsorb moisture from the surrounding air. Please note: When you first use the silica gel in the area to be protected, it may become saturated rather quickly as it “drinks up” residual moisture. Once the residual dampness is removed, you can maintain a dry condition with less frequent need to reactivate the Silica Gel.
Orange silica gel can be reactivated in an oven for re-use. This material is not classified as hazardous waste under EEC Directive 91/689/EEC Dispose of in accordance with all applicable local and national regulations. This material is not classified as special waste under UK Special Waste Regulations 1996 and can be disposed of by landfill at an approved site.

The lethal dose for humans for synthetic amorphous silica is estimated at over 15,000mg/kg. Health Effects Inhalation Synthetic amorphous silica gel has little adverse effect on lungs and does not produce significant disease or toxic effect when exposure is kept below the permitted limits. However existing medical conditions (eg asthma, bronchitis) may be aggravated by exposure to dust. Effects of dust may be greater, and occur at lower levels of exposure in smokers compared to non-smokers. Eye Contact Dust may cause discomfort and mild irritation. Skin Contact Dust may have a drying effect on the skin. Carcinogenicity Amorphous silica is not classifiable as to its carcinogenicity to humans (Group 3).

Silica gel classified by the FDA as a Generally Recognized as Safe (GRAS) product, however,all packets of clear silica gel carry a warning label or hazard symbol. Although technically non-toxic, silica gel’s moisture-absorption properties can cause mild nausea, constipation and vomiting if ingested. Most poison control centers do not consider ingestion of clear silica gel to be an emergency. A second type of silica gel is called “indicator” gel because of its ability to change color when exposed to moisture such as blue silica gel, orange silica gel. Indicator gel dyed blue using cobalt chloride, a toxic chemical believed to be carcinogenic and cause respiratory irritation, turns pink when exposed to moisture. If ingested, poison control or 911 should be called and informed of the ingestion of cobalt chloride.

Silica gel ingested through the eating of a packet or the eating of “clumping” cat litter will most likely cause a gastrointestinal upset that could include nausea and vomiting. Consumed in large doses or repeatedly over time, silica gel can cause intestinal blockage.

Silica gel is currently a kind of product with more market demand. Silica gel is a granular, glassy, porous form of silica synthesized from sodium silicate. Silica gel is harder than common household gel-like gelatin and AGAR. It is a naturally occurring mineral that is refined and processed into any granular or beaded form. As a desiccant, it has an average pore size of 2.4 nm and has a strong affinity for water molecules. Silicon gel is a small file package most often encountered in daily life. In this form, it is used as a desiccant to control local humidity to avoid damaging some goods or degrading.

As the use of silica gel is more and more widely, people are using silica gel more and more, then the way to buy silica gel has become a problem. People are eager to buy a good price, quality of this cost-effective silicone.

Generally speaking, there are two ways, online shopping and going to a physical store. As the Internet becomes more and more developed, it is more and more popular for people to go online and buy things online. Most people will choose to go online. There are many kinds and choices online. In this way, you can shop around in the shortest time. You can choose the most reasonable price and quality of the best business to buy silica gel.

First recommend Bouling Chemical Co., Ltd. Silica gel, he can buy online. The main products of Bouling Chemical Co., Ltd. are high purity silica gel, which is produced by a professional team. They are not only reasonable in price, but also of good quality. Loved by the public, very high cost performance. Enter the web page can see their silicone pictures, online inquiry and other independent choice.

There are also many advantages of buying silicone in physical stores. For example, you can directly see how the quality of silicone you need is, which needs to test people’s endurance and observation. You need to go to different businesses for comparison visit, it is recommended to find a number of manufacturers for comparison, or inquire about the local reputation of better businesses, high visibility, then their silica gel quality is also good.

After the merchant. You can tell the boss your needs, such as what price range, what is the purpose of the silicone you buy, what kind of quality grade you need, etc. Merchants usually meet the demand.

In short, there are many ways to buy silica gel, but it is not easy to find high-quality satisfactory silica gel. What matters is the buyer’s own inner needs and standards.

A lot of candy, cookies are put with desiccant silica gel . Some children are not careful to eat the desiccant silica gel, or children are curious of desiccant silica gel, put them in the mouth and chew it, causing eating.
The desiccant silica gel in market, generally divided into four types:
Transparent silica gel ,it is non-toxic and can not be absorbed in the gastrointestinal tract. It can be discharged by the feces. This desiccant silica gel is not toxic to humans, usually no problem. If swallowed , you have the dizziness, vomiting, and other special symptoms and you need to go to the hospital.
Brown iron oxide, little irritation, let children drink water to dilute, if children eats a lot and have nausea, vomiting, abdominal pain, diarrhea symptoms, they may be iron poisoning and should
be taken to hospital.
Calcium chloride, only little irritation, just drink plenty of water diluted.
Calcium oxide, will become calcium bicarbonate with water, alkali, corrosive and should first drink diluted, and then sent to the hospital for further processing.

Using indicating silica gel desiccant to protect tea, moistureproof effect is better.

The storage method is similar with the quick lime, charcoal and only this effect is better. Generally, storage after six months, the tea still maintain its freshness. Indicating silica gel is blue before absorbing moisture , when desiccant particles from blue to translucent pink means the water absorption has reached saturation, so we have to take it out, on the fire baking or in the sun ,until restore the original color , which may continue to put in use.

DIY:Use desiccant silica gel to make a dapproof electronic cabinets

To the spring and summer, sometimes the home is more humid, do not underestimate these tidal.You should be aware of protecting beloved cameras, lenses and some valuables from moisture. Buy Electronic Cabinets is not necessary, if you just have few photographic equipment.

In fact, the homemade Cabinets also can keep Away from Moisture. Better sealing of the container with silica gel desiccant, which is inexpensive, and can also receive a satisfactory protecting effects.

Desiccant silica gel is the most critical material for the dampproof cabinets. Now the desiccant silica gel available in commonly used three types are: silica gel desiccant, lime desiccant and carbon desiccant, the silica gel desiccant is most fit for the use.

Silica gel desiccant is divided into two types: blue silica gel and colorless silica gel. Blue silica gel with the increase of the adsorbed moisture from blue to red to show the ambient humidity, the drawback is that containing cobalt chloride, a micro-toxic, blue silica gel is widely used in equipment and other items moisture. Colorless silica gel is non-toxic non-hazardous products, widely used in food and medicine moisture, low price, if failure , the surface of Silica gel will become slightly yellow, you can replace. So we choose a colorless silica gel.

Reuse of silica gel

The Desiccant silica gel is heated in a microwave oven, place a few good tissues below the desiccant silica gel, and temperature was controlled at 120 degrees (equivalent to microwave oven in low heat), a heating time of 10 minutes or so, at the second heating, the silica gel desiccant can be reused.

A lot of people after using the camera, directly put the camera into the camera bag, then put a desiccant in the camera bag, this approach is not desirable, because the camera bag does not seal, the desiccant is easily saturated , and it would not achieve sustained drying effect.
Do not select the mothballs and lime desiccant, they are easily attached to the lens and other optical components, resulting in corrosion.

Container desiccant silica gel

Container desiccant silica gel can protect transportation security of products by controlling of the dew point to avoid fog rain phenomena. The unique design of the container desiccant silica gel ensures that it has excellent moisture absorption performance and the phenomenon of leakage and water dripping does not occur.
Silica gel Desiccant for Container has strong adsorption capacity for the vapor inside the container. It can effectively lower the dew point, thus controlling the condensation of vapor inside container. The weight of vapor that can be adsorbed by 100 gram of container desiccant is as follows:at RH 50%, 25gram min; at RH 90%,35 gram min.The desiccant can still keep its dry appearance after adsorption without causing any pollution.It can be disposed of as normal trash after being used.

Most damage to stored valuables and supplies is caused by humidity trapped within the enclosed storage unit itself. Humidity in the space turns into condensation which can often cause irreparable damage.

Silica Gel products will help to eliminate rust, corrosion, oxidation and tarnish on tools, coin collections, silverware, jewelry, musical instruments and more. In addition, silica gel can protect seasonal storage, collectibles, clothing, leather and more from mildew, fungus, mold and odor. Furthermore, photographs, stamp collections, and documents can be protected from spotting, staining and cracking. See the list below for other areas where the silica gel dehumidifiers can be helpful in eliminating moisture.
These desiccant silica gel packets are usually used for preserving the quality of an object inside an enclosed package. Letting an object be kept ignoring the changes in humidity and presence of moisture inside the package will gradually damage the object enclosed inside a box. The first use of silica gel packets is mentioned to be in World War II to keep the penicillin dry; this proved that it is a great drying agent. It can also be used as air freshener, is effective in absorbing bad odors and gradually will eject fragrance all over the place. Important documents and belongings that should be dry all the time can be stored safely having desiccant silica gel inside the storage bins and other storage areas as it prevents the moisture and condensation. Camera lenses are very prone on getting moisture when there is a change in temperature. Silica desiccant can absorb the moisture present on the lenses of the camera. As digital cameras need more attention because of their delicate structure, putting some silica gel would be a great help for a longer lens life. Guns and ammo should also have protection against moisture. It is advisable to put silica gel packets on their storage. Thees will absorb the moisture present inside the storage. Moisture on guns and ammo will create rust and loss its reliability. Cell phones are very valuable to almost all of its users. Generating moisture inside a cell phone unit will gradually slow its original performance or worse, may make it a total wreck. Putting silica gel on the unit may lessen this to occur. It is an effective moisture-absorber and may save your unit from crash. Silica gel packets can be reused many times. An indicator is now available in the market to know if they should undergo regeneration process. Aside from putting it into the microwave oven or heating it under the sun, there is variety of desiccant silica gel canisters. It is said that when the indicator turns from blue into pink, the silica gel packets should be regenerated.