Molybdic acid

HCID 82208

Basic information

CAS
27546-07-2
Standard SMILES
[O]=[Mo](=[O])([OH])[OH]
InChIKey
VLAPMBHFAWRUQP-UHFFFAOYSA-L
Molecular formula
H2-Mo-O4
Average molar mass
161.96 g/mol

Overview

Molybdic acid is a molybdenum oxoacid. It is a conjugate acid of a hydrogenmolybdate.

Names & identifiers

Preferred name
Molybdic acid
IUPAC
dihydroxy(dioxo)molybdenum
English name
Ammonium dimolybdate
Molecular formula
H6MoNO+
Molecular weight
132

Names & synonyms

Molybdic acid7782-91-4Molybdic(VI) acidMolybdate (MoO42-), dihydrogen, (T-4)-I96N991J1NCHEBI:25371RefChem:819194231-970-5dihydroxy(dioxo)molybdenumMolybdicacidDiammonium dimolybdateUNII-I96N991J1N
Show more names
Molybdic(Ⅵ) acidAmmonium DimolyPateDiammoniumdimolybdatAMMONIUM DIMOLYBDATEAMMONIUM MOLYBDATE TSmolybdate, diammoniumAmmoniumdimolybdate,99%AMMONIUM MOLYBDATE (DI)
H2MoO4EINECS 231-970-5MFCD00036287Molybdate (MoO42-), dihydrogen, (beta-4)-Molybdate (MoO42-), hydrogen (1:2), (T-4)-Molybdic acid (H2MoO4)H2MoO4.12H2O11099-00-6

Database identifiers

CAS
27546-07-2、7782-91-4
PubChem CID
82208
ChEBI
CHEBI:25371
UNII
I96N991J1N
EC Number
231-970-5、248-517-2

Properties

Computed structural properties

Topological polar surface area
74.6 Ų
Hydrogen bond donors
2
Hydrogen bond acceptors
4
Rotatable bonds
0
Heavy atoms
5

Experimental & physicochemical properties

Chemical Classes · 2 items

Metals -> Metals, Inorganic Compounds

Metals -> Metals, Inorganic Compounds

Physical Description · 4 items

Dry Powder

Monohydrate: White solid; Slightly soluble in cold water, more soluble in hot water; [Merck Index] Yellowish odorless powder; Insoluble in water; [MSDSonline]

White powder with an ammoniacal odor; Soluble in water; [Alfa Aesar MSDS]

V (@25 °C)

Physicochemical properties

Melting point
300 °C · 300 °C
Density
3.1 · 3.1
storage temp.
Sealed in dry,Room Temperature
solubility
2 O · soluble in H2O
form
Powder
color
white

Safety & regulation

GHS classification

GHS Classification · 6 items

This chemical does not meet GHS hazard criteria for 57.3% (125 of 218) of all reports.

Warning

H319 (42.2%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]

P260, P261, P264+P265, P271, P280, P304+P340, P305+P351+P338, P319, P337+P317, P403+P233, P405, and P501 (click each P-code to see the statement)

Aggregated GHS information provided per 218 reports by companies from 13 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

This chemical does not meet GHS hazard criteria for 99.1% (211 of 213) of all reports.

Hazard information

Regulatory Information · 6 items

Chemical: Molybdate (MoO42-), dihydrogen, (T-4)-

Chemical: Molybdate (Mo2O72-), diammonium

Molybdate (MoO42-), hydrogen (1:2), (T-4)- is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Molybdate (MoO42-), hydrogen (1:2), (T-4)- are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)

Status: Active Update: 01-06-2022 https://echa.europa.eu/registration-dossier/-/registered-dossier/17317

Status: Active Update: 13-09-2021 https://echa.europa.eu/registration-dossier/-/registered-dossier/14454

Molybdate (Mo2O72-), diammonium: Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right.

Other Safety Information · 2 items

IMAP assessments - Molybdenum Trioxide and Molybdic Acid: Human health tier II assessment

IMAP assessments - Molybdate (Mo2O72-), diammonium: Human health tier I assessment

Hazards Summary · 2 items

Prepared as the monohydrate, molybdic(VI) acid has the formula H2MoO4; [Merck Index] An eye irritant; [eChemPortal: ERMA] An irritant; [MSDSonline] See Molybdenum.

May cause irritation; [Alfa Aesar MSDS] See Sodium molybdate(VI) dihydrate.

Hazard Classes and Categories · 3 items

Not Classified

Eye Irrit. 2 (42.2%)

Carcinogenicity - category 2

Safety & protection

Threshold Limit Values (TLV) · 2 items

0.5 [mg/m3], as Mo, respirable fraction

0.5 [mg/m3], as Mo, respirable fraction

Permissible Exposure Limit (PEL) · 2 items

5.0 [mg/m3], as Mo

5.0 [mg/m3], as Mo

Protective Action Criteria (PAC) · 6 items

12 [mg/m3]

130 [mg/m3]

770 [mg/m3]

2.5 [mg/m3]

28 [mg/m3]

170 [mg/m3]

Immediately Dangerous to Life or Health (IDLH) · 2 items

1000.0 [mg/m3], as Mo

1000.0 [mg/m3], as Mo

Safety data

tsca
TSCA listed
hs_code
28417010
risk_code
36/37/38
Signal word
Warning
hazard_code
Xi
safety_code
24/25

Chemistry & industry

Uses & manufacturing

Uses · 2 items

Used in chemical synthesis, for extraction, refining, and processing of metals, as a coloring agent, construction materials additive, flame retardant, process regulator, catalyst, and in the production of other molybdenum compounds and alloys; [IUCLID] Used to make catalysts, activated charcoal impregnants, molybdenum compounds, base metals and alloys, and large scale and fine chemicals, to formulate lubricants-lubricant additives-greases, coatings-paints-thinners, fillers-putties-plasters, metal surface treatment products (including those for galvanizing and electroplating), non-metal surface treatment products, flux coating/core welding and soldering products, and laboratory chemicals, and as a micronutrient in fertilizers; [ExPub: ECHA REACH Registrations]

Welding [Category: Weld]

U.S. Production2023: <50,000 lb
Industry UsesIntermediate
General Manufacturing Information · 2 items

All Other Basic Organic Chemical Manufacturing

Molybdate (MoO42-), hydrogen (1:2), (T-4)-: ACTIVE

Applications · 2 items

UsesAmmonium molybdates are used to prepare high purity grade molybdenum metal powder, sheet, or wire; for colorimetric analysis of phosphates and arsenates; for decorating ceramics; and as catalysts.

UsesAmmonium molybdate (di) is used as pigments, agricultural fertilizer, color lakes and fabric fire retardant agent. It is also used as a raw material for the production of molybdenum wire, ceramic glazes and other molybdenum compounds. Further, it is used in photography, ceramics and paints. It is also used reagent for analysis as well as in the determination of phosphorus in analytical chemistry. In addition, it is used as a catalyst in the petrochemical industry.

Preparation methods

PreparationAmmonium molybdate is prepared by treating molybdenum oxide with excess ammonia in an aqueous solution. The crystals are obtained after evaporation of water. MoO3 + 2NH3 + H2O → (NH4)2MoO4

Upstream & downstream products

Upstream raw materials

Suppliers100 total

湖北永阔科技有限公司027-59223108 15972152991 · [email protected]
上海阿拉丁生化科技股份有限公司400-6206333 13167063860 · [email protected]
湖北万得化工有限公司15377098680 15377098680 · [email protected]
广州纳珑化工有限公司13192879270; 13192879270 · [email protected]
湖北成丰化工有限公司13125175253 · [email protected]

Related reactions

15 records

Compound notes

Loading…