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重要文件

42019

Supelco

重铬酸钾

reference material for titrimetry, certified by BAM, >99.5%

同義詞:

红矾钾

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About This Item

線性公式:
K2Cr2O7
CAS號碼:
分子量::
294.18
EC號碼:
MDL號碼:
分類程式碼代碼:
41116107
PubChem物質ID:
NACRES:
NA.24
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等級

reference material

品質等級

化驗

>99.5%

技術

titration: suitable

mp

398 °C (lit.)

形式

neat

SMILES 字串

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

InChI

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

InChI 密鑰

KMUONIBRACKNSN-UHFFFAOYSA-N

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一般說明

重铬酸钾是一种在严格条件下生产的氧化标准品,并以尽可能高的精度进行测量。其含量测定和均匀性评估使用体积氧化还原滴定作为主要分析方法进行。

應用

它可作为标准物质,用于在氧化还原滴定中标定滴定溶液。

特點和優勢

  • 以安全洁净的玻璃瓶形式提供,以确保其在打开前的整个保质期内保持稳定性。
  • 可追溯至 NIST SRM
  • 高品质材料,可提供精准的滴定测定
  • 随附分析证书(CoA)

分析報告

精确浓度、有效期、可追踪性以及认证的详细信息请见每个包装内的证书和认证报告。含量和有效期见标签。

訊號詞

Danger

危險分類

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

標靶器官

Cardio-vascular system, Respiratory system

儲存類別代碼

5.1B - Oxidizing hazardous materials

水污染物質分類(WGK)

WGK 3

閃點(°F)

Not applicable

閃點(°C)

Not applicable

個人防護裝備

Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges


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分析證明 (COA)

Lot/Batch Number

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存取文件庫

Changes in aquatic toxicity of potassium dichromate as a function of water quality parameters
Kikuchi M, et al.
Chemosphere, 170, 113-117 (2017)
Raman spectroscopic study of oxidation of aniline and N-methylaniline with dichromate
Mazeikiene R, et al.
Journal of Molecular Structure, 1139, 333-337 (2017)
Shafaqat Ali et al.
Environmental toxicology and chemistry, 32(10), 2234-2239 (2013-06-19)
A hydroponic experiment was carried out to examine the effect of hydrogen sulfide (H2 S) in alleviating chromium (Cr) stress in barley. A 2-factorial design with 6 replications was selected, including 3 levels of NaHS (0 μM, 100 μM, and
Bour-Jr Wang et al.
Journal of the Formosan Medical Association = Taiwan yi zhi, 110(12), 775-779 (2012-01-18)
Occupational dermatitis among cement workers is a major occupational health concern. The two most important occupational hazards for cement workers are irritant and allergic cement contact dermatitis. The objective of this study was to investigate the severity of occupational cement
Fu-Jun Liu et al.
Toxicological sciences : an official journal of the Society of Toxicology, 110(2), 307-318 (2009-06-03)
Werner syndrome is a premature aging disorder characterized by cancer predisposition that is caused by loss of the Werner syndrome protein (WRN) helicase/exonuclease DNA repair protein. Hexavalent chromium is an environmental carcinogen and genotoxicant that is associated with respiratory cancers

Questions

1–3 of 3 Questions  
  1. 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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  2. 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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  3. ¿Is this item certified on ISO 17034?

    1 answer
    1. This product is a BAM Certified reference material. BAM is accredited as an RM manufacturer in accordance with DIN EN ISO 17034 (General Requirements for the Competence of Reference Material Manufacturers) by the German Accreditation Body (DAkkS). The certification of our reference materials is based on the principles and requirements of DIN EN ISO 17034 and ISO Guide 35.

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