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NIST136F

Potassium dichromate

NIST® SRM® 136f, oxidimetric standard

Synonym(s):

Potassium bichromate

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About This Item

Linear Formula:
K2Cr2O7
CAS Number:
7778-50-9
Molecular Weight:
294.18
MDL number:
MFCD00011367
UNSPSC Code:
41116107
PubChem Substance ID:
329818704
NACRES:
NA.24
Pricing and availability is not currently available.

grade

certified reference material

Quality Level

100

packaging

pkg of 60 g

manufacturer/tradename

NIST®

technique(s)

titration: suitable

mp

398 °C (lit.)

format

neat

SMILES string

[K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O

InChI

1S/2Cr.2K.7O/q;;2*+1;;;;;;2*-1

InChI key

KMUONIBRACKNSN-UHFFFAOYSA-N

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General description

This Standard Reference Material (SRM) is certified as a chemical of known assay for use as a primary oxidimetric standard. A unit of SRM 136F consists of 60 g of highly purified potassium dichromate (K2Cr2O7) in a clear glass bottle. The certification of SRM 136f is valid, within the measurement uncertainties specified, provided the SRM is handled and stored in accordance with the instructions given under “Instructions for Use” in the certificate.

SRM 136F_CERT

SRM 136F_SDS

Application

This Standard Reference Material (SRM 136F) is intended for use as a primary oxidimetric standard.

Other Notes

Certified for the analytes listed below.
Potassium Dichromate (K2Cr2O7)

See certificate for values and more details at nist.gov/SRM.

Legal Information

NIST is a registered trademark of National Institute of Standards and Technology
SRM is a registered trademark of National Institute of Standards and Technology

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Product No.
Description
Pricing

Signal Word

Danger

Hazard Classifications

Acute Tox. 2 Inhalation - Acute Tox. 3 Oral - Acute Tox. 4 Dermal - Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1B - Eye Dam. 1 - Muta. 1B - Ox. Sol. 2 - Repr. 1B - Resp. Sens. 1 - Skin Corr. 1B - Skin Sens. 1 - STOT RE 1 Inhalation - STOT SE 3

Target Organs

Cardio-vascular system, Respiratory system

Storage Class Code

5.1B - Oxidizing hazardous materials

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number

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Questions

1–2 of 2 Questions  

  1. What does the "3110" lot number signify in the system?

    1 answer

    1. The "3110" lot number is used as a placeholder in the system when an actual lot number is not available.
      In this particular instance, the way NIST numbers their lots does not align well with the lot numbering convention in SAP. NIST incorporates the lot identification within their product numbers. For example, for the product NIST136F, the lot is identified as "F", succeeding the previous lot "E". As new lots are released by NIST, a new product number is assigned, such as NIST136G for the subsequent lot, and the pattern continues accordingly.

      Helpful?

  2. 1. How can one locate a Certificate of Analysis (COA) for a NIST standard? 2. Are lot numbers assigned to NIST Standards?

    1. How can one locate a Certificate of Analysis (COA) for a NIST standard?
    2. Are lot numbers assigned to NIST Standards?

    1 answer

    1. 1) You can find certificates and other product information on NIST’s website: https://shop.nist.gov/

      Remove "NIST" prefix from our product number when searching on the NIST website (e.g. “136F” instead of “NIST136F”)

      2) No, NIST does not have lot numbers, and instead the product number is changed.

      NIST lots are denoted in their product numbers. Take NIST136F for example. The current lot is “F”, whereas NIST136E came before it. When NIST releases a new lot for Product 136, we will create a new product number, NIST136G, and so on.

      Helpful?

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