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Health & Safety Data Sheets
KLUCEL GF & EF (SY26)
Product Name
KLUCEL GF & EF, Hydroxypropyl cellulose
Description
Klucel is a non - toxic cellulose ether with a remarkable combination of properties making it of great interest to the conservator. An odourless, light cream to white free flowing powder or granulate, it is soluble in cold water and insoluble in hot water. It is soluble in some solvents and insoluble in others. This makes it very useful as a ‘ barrier ‘ to protect sections of the item being worked on from processes being carried out elsewhere. Solutions are clear, smooth & exceptionally free from gels & fibres. Klucel is extremely flexible without plasticisers when used as a film or coating and is heat sealable and non -tacking at high humidity. The “ P “ suffix relates to it being of a purer, refined, food grade quality.
Technical Information
- Soluble in water below 38 °C
- Insoluble in water above 45° C
- Soluble in polar organic solvents such as : Methyl Alcohol - Ethyl Alcohol - Isopropyl Alcohol ( 95% ) - Cellosolve etc.
- Insoluble in the following: Toluene - Xylene - 1,1,1 Trichloroethane etc.
| pH value (1% solution) | pH 5.0 to 8.5 | | Viscosity (Brookfield LVF Viscometer Spindle 2, speed 60 ) | Klucel GF @ 2% solution 150 - 400, Klucel EF @ 10% solution 150 - 700 | | Moisture content | 5% Max. | | Ash Content: (calculated as Na2S04) | 0.5% Max, Silica Free | | Particle Size | 85% Min. through 30 Mesh (0.595 MM), 99% Min. through 20 Mesh (0.841 MM) |
Instructions for Use
To dissolve Klucel in either water or one of the polar organic solvents the following method must be used in order to avoid lumping during the preparation of solution.
The Klucel must be pre - slurried in a non - solvent such as hot water (50 -60°C) or glycerin, prior to the addition of the main volume of water.
Prepare a high solids slurry by adding dry Klucel powder to 6 times 9 or more its weight of well agitated hot water.
N.B. Do not allow the temperature to exceed 60° C.
Stir the slurry for a few minutes before adding to the main body of cold water. This pre - soak results in a faster dissolving of the particles in the second step. Ensure that the slurry temperature does not fall below 50° C as this would result in the formulation of a gelatinous mass.
In the second step the hot slurry is diluted with cold water (room temperature or lower). Agitation is continued until all particles are dissolved and solution is completely free of gels. Do not agitate too briskly as this causes foaming and air entrainment. Dissolving periods of 10 minutes or more may be required depending on solution concentration and viscosity type being used. The lower viscosity (E) dissolves faster than the higher viscosity (G) grade.
Application tips from users
Used as a 4% solution in ethanol for leather consolidation, Klucel has been successfully used as an adhesive for paper repair and as a consolidant for parchment material. Badly stained wooden artifacts have been cleansed by using a 1:9 water to industrial methylated spirit (95% ethanol, 5% methanol) mix in Klucel G to produce a gel. The gel is applied locally to the damaged area and covered with a protective polythene layer. After 2 - 3 hours the gel is carefully removed manually. Reapplication may be necessary before the area is washed down using industrial methylated spirits. Increasing the water content may well effect the wood grain.
Health and Safety Information
No permanent effects on humans known from discontinuous short or long term exposure when used as directed. Wet floors on which this powder is spilt may become very slippery. This powder when dispersed in air represents an explosion hazard. Handle in a well ventilated, dry area. Earth all equipment. Keep away from heat, sparks and all sources of ignition. See main material safety data sheet leaflet.
- When dispersed in air this powder represents an explosion hazard.
- Handle in a well ventilated, dry area.
- Earth all equipment.
- Keep away from heat, sparks and all sources of ignition.
- See Main MSDS leaflet.
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Material data sheet
KLUCEL Hydroxypropyl cellulose
Information on Ingredients
Chemical Description : Hydroxypropyl cellulose
Hazards Identification
| Caution | If this powder is spilt on to wet floors they may become very slippery. when dispersed in the air this powder represents an explosion hazard | | Short Term Exposure | No permanent effects on humans known from discontinuous short - term exposure when used as directed | | Long Term Exposure | No permanent effects on humans known from discontinuous short - term exposure when used as directed. | | Ecology | No long - term ecological effects |
FIRST AID MEASURES
| SKIN | Wash off immediately with plenty of soap & water | | EYE CONTACT There may be mild irritation and redness. Vision may be impaired due to the presence of Magnesium Carbonates on the eye. | Wash the chemical out of the eye with flowing water for ten minutes | | INGESTION May cause intoxication in quantity | Wash mouth out thoroughly with water. In severe cases obtain medical attention | | INHALATION | Remove from area of exposure |
FIRE FIGHTING MEASURES
Flammable. Use foam, dry powder, Carbon Dioxide or vapourising liquids.
SPILLAGE AND LEAK PROCEDURES
| FIRST ACTION | (i) Eliminate all sources of ignition immediately and instruct others to keep at a safe distance, well away from the spillage area. (ii) Open window, if possible, and close laboratory doors on way out. Aim to ventilate the area but isolate the material. | | SMALL SPILLS ~ Liquids < 0.5 litre | Absorb on paper and allow to evaporate in a fume cupboard or open air. | | LARGE SPILLS ~ Liquids < 25 litre | Absorb the chemical onto sand or vermiculite and transfer into bucket, move to open air and allow to evaporate. |
STORAGE & HANDLING
Use in well ventilated area. Wear gloves where continued skin contact may occur. Store in a well ventilated place protected from frost.
EXPOSURE CONTROLS/ PERSONAL PROTECTION
| Respirator | Not applicable (but may be advisable in close proximity) | | Gloves | Rubber or Plastic | | Eye Protection | Face mask or goggles when changing pressurised cylinders (as a precautionary note: recommended during general use.) |
PHYSICAL & CHEMICAL PROPERTIES
| Density (g / ml) | 0.95 | | Solubility in Water | Reacts with water to form gel | | Flash point | 86°C ~ Ignition Temperature N/A Explosion Limits N/A |
STABILITY & REACTIVITY
No hazardous decomposition products known
TOXICOLOGICAL INFORMATION
No evidence of carcogenic properties or mutagenic or teratogenic effects. May be harmful if ingested in quantity.
LD50 > 2000 mg / kg oral rat.
DISPOSAL CONSIDERATIONS
No special requirements but chemical residues are generally classified as special waste, and as such are covered by local regulations
Contact your local waste disposal authority.
TRANSPORT INFORMATION
UN No: 1993 ~ IMO: NR ~ IMDG class: NR IATA: NR Correct technical name: NOT RESTRICTED ADR / RID: 3.32
REGULATORY INFORMATION
Labeling according to EEC DIRECTIVES SYMBOL: NONE ~ R- Phrases: None S- Phrases: S25-29- 51
Whilst CHARNWOOD BOOKS has taken every care to ensure accuracy of the data contained in this document, no guarantee of liability will be assumed. It is recommended that customers satisfy themselves of the suitability of all products.
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