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C204

Supelco

Calmagite

metal indicator

Synonym(s):

1-(1-Hydroxy-4-methyl-2-phenylazo)-2-naphthol-4-sulfonic acid, 3-Hydroxy-4-(2-hydroxy-5-methylphenylazo)naphthalene-1-sulfonic acid

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$184.00

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10 G
$77.76
25 G
$184.00

About This Item

Linear Formula:
HOC10H5[N=NC6H3(OH)CH3]SO3H
CAS Number:
3147-14-6
Molecular Weight:
358.37
Beilstein/REAXYS Number:
708596
EC Number:
221-563-0
MDL number:
MFCD00011656
UNSPSC Code:
12352204
PubChem Substance ID:
24892461
NACRES:
NA.83

$77.76

List Price$86.40Save 10%
Web-Only Promotion

Available to ship onMay 20, 2025Details

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Product Name

Calmagite, indicator grade

grade

indicator grade

Quality Level

200

form

powder and chunks

technique(s)

titration: suitable

mp

330 °C (lit.)

λmax

602 nm

SMILES string

Cc1ccc(O)c(c1)N=Nc2c(O)cc(c3ccccc23)S(O)(=O)=O

InChI

1S/C17H14N2O5S/c1-10-6-7-14(20)13(8-10)18-19-17-12-5-3-2-4-11(12)16(9-15(17)21)25(22,23)24/h2-9,20-21H,1H3,(H,22,23,24)

InChI key

VBRNLOQCBCPPHL-UHFFFAOYSA-N

Gene Information

human ... MPL(4352)

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Application

Used as an indicator in the titration of calcium or magnesium with EDTA.
Used for the determination of magnesium in biological materials.[1]

pictograms

Exclamation mark
GHS07

signalword

Warning

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

target_organs

Respiratory system

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
BCCM6984
BCCK2150
BCCJ1353
BCCF2333
BCCC9488

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Calmagite method for determination of serum magnesium modified.
S A Cohen et al.
Clinical chemistry, 26(6), 783-783 (1980-05-01)
Bahram Hemmateenejad et al.
Analytica chimica acta, 607(2), 142-152 (2008-01-15)
Annihilation of the contribution of one chemical component from the original data matrix is a general method in rank annihilation factor analysis (RAFA). However, RAFA is not applicable for studying the protonation equilibria of multiprotic acids. In this work, a
Rapid measurement of serum magnesium with a kit.
P West
Clinical chemistry, 30(8), 1426-1427 (1984-08-01)
Laboratory Medicine, 12, 139-139 (1989)
M H Abernethy et al.
Clinical chemistry, 28(3), 520-522 (1982-03-01)
Magnesium in plasma is determined by diluting a 50-microL sample with 5.0 mL of stable calmagite reagent containing the amphoteric detergent Empigen BB, and buffered with 2-amino-2-methyl-1-propanol at pH 11.5. The calcium response is masked with strontium-buffered [ethylene-bis(oxyethylenenitrilo)]tetraacetate (EGTA), while
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Questions

1–2 of 2 Questions  

  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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