Product Safety Center

Understanding the Label


  Sigma Product Labels

Sigma product labels are designed to provide complete, up-to-date information on our products ... Information available when and where you need it most.

On our labels, you can find:

  • Complete product name and description
  • Health and safety hazard information
  • Lot-specific analytical data on many types of products
  • Pictograms for instant hazard recognition
  • Useful data for reference, CAS (Chemical Abstracts Service) number, chemical formula

Key to Sigma Product Labels:

image of key to Sigma Product Labels
A Product Name and Description
B Product Number
C Further Descriptive Information
D Recommendations on Handling and Storage
Storage temperatures indicated are for long-term storage of products. Products may be shipped under different conditions to reduce shipping costs, while still ensuring product quality.
E Hazard Statement
Indication of danger.
F Lot Analysis
Data on activity, purity, degree of hydration, etc., for this lot.
G Package Size
Unless the material is described as pre-weighed, the package will normally contain at least the indicated quantity, and usually somewhat more. For some products, the actual quantity at time of packaging is also shown. The user should always measure the amount needed from the container.
H Lot Number
I Hazard Pictogram
Lets you know at a glance what safety hazards are involved in the use of this product.
J Further Hazard Information
More complete description of actual hazards, handling precautions, and emergency management procedures.
K CAS Number
Chemical Abstract Service number shown wherever available. CAS numbers vary in how specifically they define the material. We make every effort to provide the most specific CAS number which applies. Where a CAS number is provided for a mixture or solution, it is usually the CAS number of the solute or component referred to in the main label name.
L Chemical Formula and Formula Weight
Unless water of hydration is indicated in the formula, the formula weight is for the anhydrous material.
M Country of Origin
N Material Safety Data Sheet Available:
A Material Safety Data Sheet is available for this product.
O EC Number:
EC Number (EINECS or ELINCS), products without an EINECS number will carry the warning statement, "Caution: Substance Not Yet Fully Tested."
  Aldrich Product Labels

Key to Aldrich Product Labels:

image of key to Aldrich Product Labels
A Product Name and Description
B Product Number
C Further Descriptive Information
D Recommendations on Handling and Storage
Storage temperatures indicated are for long-term storage of products. Products may be shipped under different conditions to reduce shipping costs, while still ensuring product quality.
E Hazard Statement
Indication of danger.
F Lot Analysis
Data on activity, purity, degree of hydration, etc., for this lot.
G Package Size
Unless the material is described as pre-weighed, the package will normally contain at least the indicated quantity, and usually somewhat more. For some products, the actual quantity at time of packaging is also shown. The user should always measure the amount needed from the container.
H Lot Number
I Hazard Pictogram
Lets you know at a glance what safety hazards are involved in the use of this product.
J Further Hazard Information
More complete description of actual hazards, handling precautions, and emergency management procedures.
K CAS Number
Chemical Abstract Service number shown wherever available. CAS numbers vary in how specifically they define the material. We make every effort to provide the most specific CAS number which applies. Where a CAS number is provided for a mixture or solution, it is usually the CAS number of the solute or component referred to in the main label name.
L Chemical Formula and Formula Weight
Unless water of hydration is indicated in the formula, the formula weight is for the anhydrous material.
M Risk and Safety Statements:
Information is provided in multiple languages.
N Material Safety Data Sheet Available:
A Material Safety Data Sheet is available for this product.
O EC Number:
EC Number (EINECS or ELINCS), products without an EINECS number will carry the warning statement, "Caution: Substance Not Yet Fully Tested."

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  Pictograms
Image of pictogram symbols and hazardous codes

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